5. Jack almost fell off the cliff, but managed to ________ until help came.

　　A．keep on B．catch on

　　C．count on D．hang on

　　解析：选D　句意：杰克几乎掉下悬崖，但是他设法坚持直到救援来到。keep on"继续"；catch on"理解，明白"；count on"依靠，指望"；hang on"坚持"。根据语境可知应选D项。

　　6．I have a tight ________ for the trip, so I'm not going to fly unless the airlines lower ticket prices.

　　A．routine B．aspect

　　C．budget D．target

　　解析：选C　句意：我的旅游预算很紧，因此我不打算乘坐飞机，除非航空公司降低票价。由题干中 so 引导的并列句和 unless 引导的条件状语从句可知，此处指"我"的旅游预算紧张，故选budget。

　　7．-Have the two parties reached an agreement on the program?

　　-No idea. The meeting is _______. Let's wait and see.

　　A．under repair B．under discussion

　　C．under control D．under pressure

　　解析：选B　句意："双方就这一项目达成一致了吗？""不知道。会议在讨论中。 让我们等等看看。"under repair"在修理中"；under discussion"在讨论中"；under control"处于控制之下"；under pressure"在压力下"。根据答语中的Let's wait and see.可知会议正在讨论中，故选under discussion。

　　8．-How was your trip to London?

　　-Great. I was helped by an organization. Otherwise, I ________ it.

　　A．wouldn't afford B．hadn't afforded

　　C．wouldn't have afforded D．needn't have afforded

　　解析：选C　句意："你的伦敦之旅怎么样？""很好，我得到了一个机构的帮助。否则，我是支付不起这个费用的。"根据otherwise和was可知，此处表示的是与过去事实相反的虚拟语气，故用would/could/might have done结构，再结合选项可知应选C。

　　9．-I'd thought you couldn't deal with the situation.

　　-On the contrary, it is quite ________ my power.

　　A．beyond B．within

　　C．under D．over

解析：选B　句意："我原以为你应付不了这种情况。""相反，我很有这种能力。"beyond one's power"超出某人的能力，某人无权做某事"；within one's power"在某人的能力范围之内，某人有权做某事"；under one's power"依靠某人的力量/能力"；没