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

He has been very interested in doing research on ________ since he was at high school.

A. biology

B. biological

C. biologist

D. biologically

Đáp án
A. biology

Câu hỏi thuộc Bài tập:

Chuyên đề ôn thi: Từ loại (2)