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

Câu hỏi

If you decide to start the trip, you must reserve a seat in advance on planes or trains.

A. the

B. a

C. on

D. or

Đáp án
A. the

Câu hỏi thuộc Bài tập:

E9- TĐ- Test for Unit 8