How many computers are there in the room?—__________. Some workers moved them to another place just now.

I like this pair of trousers a lot. Can I ________? －Yes, of course,

How long have you been here? — _____ the end of last month. [ ]

What’s favorite subject?—My favorite subject is math.

He is going camping_____ 6:00 _____ the morning of July 21st. [ ]