27. “Shall Mary come and play computer games?”
“No, _______ she has finished her homework.”
| A．when | B．since | C．unless | D．as soon as |
The reason for his success is ______ he worked very hard.
| A．why | B．that | C．whether | D．how |
______ anyone should want to kill her was unbelievable.
| A．Whether | B．That | C．What | D．If |
The government has to close those small factories to prevent the water of the river ______.
| A．polluting | B．from polluting | C．being polluted | D．polluted |
He wants to see changes in the company and I am sure he will, ______.
| A．on time | B．at a time | C．at one time | D．in time |
We should try our best to ______ those people after the disaster.
| A．break out | B．cheer on | C．break up | D．cheer up |