---I’m frustrated after so many failures. I can’t see any hope.
---Behind every misfortune ________!
| A．lies an opportunity | B．does an opportunity lie |
| C．an opportunity lies | D．is an opportunity lying |
.
No teachers are permitted ________ in the classroom or in the office.
| A．smoke | B．smoking | C．to smoke | D．smoked |
.
---I’ll be away for about two days. Would you mind taking care of my little dog?
---________.
| A．Yes, it’s my pleasure. | B．Yes, I’ll do it well. |
| C．No, I’ve got no time. | D．No, I’d be happy to. |
.
--- Could you fetch me my glasses from the kitchen?
---__________ .
| A．It’s a pleasure | B．At your service | C．It doesn’t matter | D．That’s my pleasure |
.
You can’t complain of being lonely__________you don’t make an effort to meet people and make friends with them.
| A．while | B．when | C．whenever | D．though |
.
__________from the operation, the patient was advised to stay in hospital for another two weeks.
| A．Having not fully recovered | B．Being not fully recovered |
| C．Not having fully recovered | D．Not fully recovering |