Over 1500 new houses _______ each year. Last year, 1720 new houses _______.
A. were built / were built
B. are built / were built
C. are building / were built
D. were built / were being built
Chọn đáp án B
Those letters _________ now. You can do the typing later.
D . needn't typing
“Ms Jones, please type those letters before noon” “They’ve already _____, sir. They’re on your desk.”