Mark the letter A, B, C, or D on our answer sheet to indicate the coned answer to each of the following questions.
Trả lời câu hỏi dưới đây:
After her illness, Lam had to work hard to__________ his classmates.
A. chạm tới
B. theo kịp
C. đuổi kịp
D. trợ cấp