Without gravity, we _____ walk on the ground as freely as we do now.
| A．couldn’t | B．mustn’t | C．shan’t | D．needn’t |
—John, I know nothing about playing tennis．I wonder if you could teach me.
—___．Just name the day.
| A．I'm glad | B．Go ahead | C．If you want it | D．With pleasure |
This is an illness that can result in lung cancer ____ left untreated.
| A．after | B．if | C．since | D．unless |
The suit fitted him well ____ the colour was a little brighter.
| A．except for | B．except when | C．except that | D．besides |
The flowers_______ sweet in the botanic garden attract the visitors to the beauty of nature.
| A．to smell | B．smelling | C．smelt | D．to be smelt |
第二节语法和词汇知识（共15小题；每小题1分，满分15分）
从A、B、C、D四个选项中。选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
All of____ sudden, I caught ____ sight of my lost watch under the sofa.
A．a; \ B．\;a C．the; a D．a; the