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.
Câu 1: By the end of the 21st century, scientists are discovering the cure for the common cold.
A. the end of
B. 21st century
C. are discovering
D. for
Câu 2: The shopkeeper wanted the boys don’t lean their bicycles against his windows.
A. shopkeeper
B. don’t
C. their
D. against
Câu 3: Although her friends tried to persuade her to apply for the job at a local factory, but Christine refused to make an application.
A. Although
B. tried to persuade
C. to apply
D. but
A.
B.
C.
D.