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

Câu hỏi

The twentieth century was a time when there was a lot of important events.

A. The

B. a

C. was

D. of

Đáp án
C. was

Câu hỏi thuộc Bài tập:

E9- TĐ- Đề ôn số 5