Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Câu hỏi

Scientists are claiming a major breakthrough in the fight ______ cancer.

A. against

B. on

C. to

D. about

Đáp án
A. against

Câu hỏi thuộc Bài tập:

E11- GS- Unit 1- Test for unit 1