Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Câu hỏi

The teacher gave him positive feedback on his work, _________ his confidence.

A. is improved

B. improved

C. to improve

D. improving

Đáp án
D. improving

Câu hỏi thuộc Bài tập:

ĐỀ SỐ 8 - VŨ MAI PHƯƠNG