1. The political future of the president is now hanging by a __.
A thread
B cord
C string
D rope
2. The question is still__ discussion.
A in
B by
C for
D under
3. We managed to reach the top of the mountain, and half an hour later we began to __.
A ascend
B descend
C decline
D plunge
4. To survive in the intense trade competition between countries, we must__ the qualities and varieties of products we make to the world-market demand.
A improve
B enhance
C guarantee
D gear
5. There has been a __ lack of communication between the union and the management.
A regretful
B regrettable
C regretting
D regretted
答案:
1-5ADBDB
1.选A 四个选项都有绳索这个意思,但只有thread和hang by构成习语:hang by a thread千钧一发,危在旦夕
2.选D be+ prep+n(表动作的名词)来表示被动而under discussion是习惯搭配
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