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

Câu hỏi

We stayed to clean up the campsite ____it was full of rubbish.

A. so

B. or

C. but

D. since

Đáp án
D. since

Câu hỏi thuộc Bài tập:

E7- GS- Thi giữa kỳ I (1)