1.       Nationwide elections are held in the United States every four years, primarily choosing public                                                                A                                                                B            C

officials for the offices of president and vice-president.

                           D

(in this case we need to use to + infinitive to explain the meaning of doing a particular activity (why the nationwide elections are held). simple example of this form is: Music is played in stores to make people happy. so the most appropriate answer is C, because the word is supposed to choose choosing)

2.       The zoning Improvement Plan, better known as zip codes, enable postal clerks to speed the                                                                                A                                     B                             C

routing of an ever-increazing volume of mail.

                D   

(to be able to answer this question properly, you should be able to identify in advance where the subject and where the main verb of this sentence. The subject of this sentence is the Zoning Improvement Plan (singular) NOT zip codes (plural), so option B should enable Enables written)

3.       Despite of the diffucity in motivating yourself, most residents need to begin a study program at

        A                                                   B                                           C                                                    

 the beginning of their second year.

                           D         

(This question is relatively easy if you understand the following: despite the word not followed by of. while words have the same meaning and is followed by inspite of (inspite of). so that despite the word followed by the word inspite of or without follow of is WRONG. A correct answer: despite of supposed despite)

4.       The first years of one’s education are thought to provide the basic of one’s ability to learn                                            A                                                           B              C                               D

later years.

(several budget years (A) is false; they thought that the first word should describe a single noun, this is not true. first word could be used to describe a group, for example, we can say the first people I met in the United States were friendly. in the above sentence option C: basic (adjective / adjective) should be written basis (noun / noun).

5.       Born marguerite Johnson in 1928, author and poet Maya Angelou has received awards

  A                                                           B                                                         C                                 

numerous for her works, including Grammy Awards in 1994 and 1996

                                D

(right answer to the above question is C, the arrangement of the words: numerous awards are supposed to numerous awards. This is the part that is easy to explain - we need the adjective (an adjective) before the noun (a noun). in this sentence is an adjective whereas numerous awards is a noun. Another simple example is: big house)

6.       The radiations around the explosion of nuclear power plant will spread quick
a                 A                           B                                  C                               D 

(singular-plural discussion is always associated with the singular and plural objects, or nouns that can be counted and can not be calculated. therefore, when working on the problems of this section, notice or to be verb that follows it. A wrong answer because "radiation" is uncountable noun, so no need to use the suffix "s")

7.       The little children enjoy watching some deers in the zoo

        A                   B                              C                D

(on this matter, there is a plural form of the word is wrong because the writing is the same singular plural. answer C is wrong because the plural form of "deers" is "deer")

8.       She does not want to eat this delicious food as she has drunk too much waters

 A                                               B                                 C                       D

(in the sentence above, there are uncountable words written by adding the suffix "s". D wrong answer because the word "water" is uncountable noun, so no need to use the suffix "s")

9.       There are many boy in the basket ball field who practice playing basket bal
                  A           B                                       C                    D

(in this sentence, there is a plural noun that is written into a singular noun. B wrong answer because the word "boy" should be written "boys")

10.   The food does not taste nice since she puts a lot of salts in it
                          A                                       B                 C      D

(in the sentence above, there are uncountable noun that should have been written without the suffix "s". answer C is wrong because the word "salt" should be written without the suffix "s")