Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

By the end of the 21st century, scientists are discovering the cure for the common cold.

A. has increases                        

B. has declined                         

C. has gone up                         

D. has bettered

A. such a                                  

B. a lot                                      

C. too many                              

D. so much

A.   design

B.   persuade

C.   pursue

D.   increase

B. Tonight I’m going to write the tenth page of the report.

C. So far I have written ten pages of the report.

D. I have finished writng the report on the tenth page.

A. a year off         

B. a year out         

C. a year away      

D. a year’s trip

A. adults differences in learning a foreign language

B. children’s ability to learn a language

C. the age factor in learning language fast    

D. research into language acquisition