. I don’t know if she’s coming.
| A．at certain | B．for certain | C．with certain | D．on certain |
I______ myself more－it was a perfect day.
| A．shouldn’t have enjoyed | B．needn’t have enjoyed |
| C．wouldn’t have enjoyed | D．couldn’t have enjoyed |
Eye doctors recommend that a child’s first eye exam____ at the age of six months old.
| A．was | B．be | C．were | D．is |
-----Excuse me, but could I trouble you for some change?
------_______.Will pennies do?
| A．I know | B．Never mind | C．I am sure | D．Let me see |
（2013·新课标Ⅱ卷)Since nobody gave him any help, he have done the research on his own.
| A．can | B．must | C．would | D．Need |
The door ________ open, no matter how hard she pushed.
| A．shouldn’t | B．couldn’t | C．wouldn’t | D．mightn’t |