C．Should；will D．Unless；would

答案　A

解析　考查倒装句。根据题干的特点可知，主句采用的是部分倒装结构，四个选项中，只有only if引导从句时，主句要使用部分倒装结构。

9．Health problems are closely connected with bad eating habits and a ________ of exercise.

A．limit B．lack C．need D．demand

答案　B

解析　句意为：健康问题与不良的饮食习惯和缺乏锻炼息息相关。lack 缺乏，符合句意。limit限制；need需要；demand需求。

10．As far as I'm concerned，walking is a cheap，safe and enjoyable form of exercise.________，it's environmentally friendly.

A．In addition B．On the contrary

C．In return D．As a result

答案　A

解析　句意为：据我所知，走路是一种便宜、安全、令人愉快的锻炼方式，此外，它还很环保。in addition 此外，符合句意。on the contrary相反；in return 作为回报；as a result结果。

11．It was unwise of him to ________ the unreliable data in his speech.

A．refer to B．add to

C．belong to D．point to

答案　A

解析　句意为：他在演讲中提及不可靠的数据的做法是不明智的。refer to提及，符合句意。add to增添；belong to属于；point to指向。根据句意可知应选A项。

12．-Call me at 9：00.I can't afford to miss such a conference.

-Don't worry，sir. You'll surely be________.

A．reminded B．warned

C．informed D．remembered

答案　A

解析　答语句意为：别担心，先生！我们肯定会提醒你的。remind提醒，符合句意。warn警告；inform通知，告诉；remember记得。

13．-What impresses you most about Mrs. Flower's garden，the flowers，the bushes or whatever?