---May I go and play with Tom this afternoon, mum?
---No．You can’t go out ______ your homework is being done．
| A．until | B．after | C．before | D．as |
— My sons are not a little restless.
— Oh? Boys _______ be boys．
| A．should | B．can | C．may | D．will |
Mary said that once ________ him you would like him and make friends with him.
| A．meet | B．to meet | C．meeting | D．met |
–Why must you go shopping in such weather?
–My coffee has _____.
| A．run out of | B．given out | C．given away | D．used up |
There was something wrong with the network，or the e-mail____ earlier.
| A．could have been sent | B．might be sent |
| C．need have been sent | D．must be sent |
_______ she was invited to the ball made her very happy.
| A．Whether | B．That | C．Because | D．What |