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

Câu hỏi

We can avoid some diseases by _____ourselves clean.

A. keeping

B. to keep

C. keep

D. to keeping

Đáp án
A. keeping

Câu hỏi thuộc Bài tập:

E7-GS- Thi giữa kỳ I (2)