Listen! Someone ……….. at the door.
A. knock
B. knocks
C. is knocking
D. are knocking
Giải bởi Vietjack
Đáp án: C
Dịch: Nghe mà xem! Ai đó đang gõ cửa.
I am having a math lesson but I forgot my ………….. I have some difficulty.
Cuong and Minh …….. their bicycles to school form Monday to Friday.
