Some students from Grade 9 ____ do some ____ for the old.
| A．volunteered to; clean | B．volunteered; cleaning |
| C．volunteered to; cleaning | D．volunteered; clean |
You must notice ____ the emergency exit is when you enter the building．
| A．which | B．where |
| C．what | D．in which |
Oh, I'm not feeling well in the stomach．I ____ so much fried chicken just now．
| A．shouldn't eat | B．mustn't have eaten |
| C．mustn't eat | D．shouldn't have eaten |
Changing the design of a new product may ____ the risk of its production in the market．
| A．bring about | B．come about |
| C．bring up | D．come up |
Why don't you ____ it to his attention that you are too busy to go on working?
| A．pay | B．fix |
| C．bring | D．draw |
No sooner ____ down on bed ____the telephone rang．
| A．had he lain, than | B．had he lied, when |
| C．did he lie, than | D．had he laid, before |