-Can I have a day off tomorrow, Mr. Johnson?
-
---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 |
Can you ______ what I say? Do you need more explanation?
| A．make sense of | B．put an end to |
| C．attend to | D．leave alone |
It was at midnight ______ he got to his friend’s house．
| A．when | B．since | C．that | D．while |
The global warming is more and more serious, for which human beings ______．
| A．are blaming | B．are to blame |
| C．are going to blame | D．are to be blamed |
--- Grace won’t like it, you know．
---______ ? I don’t care what Grace thinks．
| A．So where | B．So what | C．So why | D．So how |