Circle the letter A, B, C, or D to indicate the correct answer to each of the following questions.

Câu hỏi

What problems _________future transport will have?

A. do they think

B. are they thinking

C. do they thinks

D. will they think

Đáp án
A. do they think

Câu hỏi thuộc Bài tập:

E7- GS- Thi cuối kỳ 2- Test 2