They must have been here the day before yesterday,＿＿＿＿?
| A．mustn’t they | B．didn’t they | C．mustn’t have they | D．had they |
____, he does not know the answer.
| A．As he is a teacher | B．As he is teacher |
| C．A teacher as he is | D．Teacher as he is |
---Do you know what Tom does all day?
---I know he spends at least _______ time watching TV as he does spend doing his lessons.
| A．more | B．as much | C．much | D．as more |
Jessica ought to stop work.She has a headache because she _______ too long.
| A．read | B．is reading |
| C．had read | D．has been reading |
It was on a cold winter evening_______ his father left home and was never back.
| A．where | B．which | C．that | D．when |
Whoever leaves the room last must ______ that all the lights are turned off.
| A．is sure | B．make sure | C．find out | D．look out |