——Yesterday, I didn’t see Ben at the party.
—— You _____ him. We just came back from Beijing this morning.
| A．mustn’t have seen | B．needn’t have seen |
| C．couldn’t see | D．can’t have seen |
Though we spent a lot, we think it _____ because we succeeded in the end.
| A．worth | B．worth being spent |
| C．worthy of | D．worthwhile |
She won a Nobel Prize for her scientific ______.
| A．interests | B．achievements |
| C．behavior | D．observation |
The flowers ______ my mother, but my sister thought they were for her and took them.
| A．were intended for | B．intended for |
| C．intended to give | D．intended giving |
At home, he keeps some pets，to which he ______ all his spare time.
| A．spends | B．offers | C．devotes | D．provides |
----Go for a picnic this weekend, OK?
----_____________. I love getting close to nature.
| A．I couldn’t agree more | B．I’m afraid not |
| C．I believe not | D．I don’t think so |