References _________ in the examination room.
A. not are used
B. is not used
C. didn’t used
D. are not used
Chọn đáp án D
“Ms Jones, please type those letters before noon” “They’ve already _____, sir. They’re on your desk.”
“What a beautiful dress you are wearing”- “thanks, it_________ especially for me by a French tailor.”
Over 1500 new houses _______ each year. Last year, 1720 new houses _______.