—Oh, Jesus, I can’t cut the durian into two halves however I tried!
—Easy, boy! Why not use _______ knife?
| A．a sharp | B．the sharper | C．a sharper | D．the sharpest |
（2013·大纲卷）Since nobody gave him any help, he have done the research on his own.
| A．can | B．must | C．would | D．Need |
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 |