______ piano is her main focus, she's also great at guitar.
| A．Since | B．Once | C．Unless | D．While |
Eye doctors recommend that a child’s first eye exam ________ at the age of six months old. (2013·浙江，8)
| A．was | B．be |
| C．were | D．is |
I ________ myself more—it was a perfect day. (2013·浙江，3)
| A．shouldn’t have enjoyed | B．needn’t have enjoyed |
| C．wouldn’t have enjoyed | D．couldn’t have enjoyed |
He________sleep，although he tried to，when he got on such a hunt for an idea until he had caught it. (2013·湖南，32)
| A．wouldn’t | B．shouldn’t |
| C．couldn’t | D．mustn’t |
If he had spent more time practising speaking English before，he________able to speak it much better now. (2013·天津，14)
| A．will be | B．would be |
| C．has been | D．would have been |
No one________ be more generous；he has a heart of gold. (2013·天津，9)
| A．could | B．must |
| C．dare | D．need |