It’s ____for us students to make a plan for studying before the beginning of the new term.

Dad, must I finish my homework today?—No, you ______. You may do it tomorrow.

Can you tell me what time the flight to Detroit leaves? —I’m sorry, but it ______．

How many workers are there in your factory?－______ the workers in my factory_______ over two thousand .

does your aunt work? ——In a restaurant.