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1. undertake v. 承担；许诺，答应
（1) She undertook ________ (pay) the money back in six months.
【答案】to pay
（2) That is one of the most challenge engineering projects they have ever ______.
A. undertaken B. understood C. focused on D. paid to
【答案】答案 A解析：undertake“承担；从事”，符合句意，此处需要用过去分词形式，故B项错误。
（3) Who do you think is the right person to ______ the task?
A. undergo B. undertake C. understand D. underline
【答案】答案 B解析：undertake the task表示“承担任务”为固定搭配。A、C、D均不与the task构成有意义的词组。
2. urge v. 竭力劝告；敦促；驱赶；推进 n. 冲动；迫切的要求
（1) There is an _________ (urge) need for food and water.
（2) Some countries understand the _________ (urge).
【答案】(1) urgent (2) urgency
（3) They urged that the library _____ open during the vacation.
A. must be kept B. is kept C. would be kept D. be kept
【答案】答案 D解析：urge后的宾语从句中常用虚拟语气，即(should) do。
（4) Since the matter was extremely ______, we dealt with it immediately.
A. tough B. tense C. urgent D. instant
【答案】答案 C解析：句意：由于事情非常紧急，我们当即进行了处理。urgent“紧急的”，tough“硬的”；tense“紧张的”；instant“迅速的”。
3. under construction正在建设之中
（1）The road is __________________(在修复).
（2）I’m glad to see that you have everything ______________________(在控制中).
（3）A：The question is under discussion.
B：The question is________ ________.
【答案】(1) under repair (2) under control (3) being discussed
（4）The firefighters soon got the fire in the building .
A．under attack B．under control
C．under construction D．under study
【答案】答案 B
解析 句意为：消防队员很快就控制住了楼里的大火。get...under control使……在控制中。
（5）The plan is currently .
A．discussed B．considered
C．under consideration D．under discuss
【答案】答案 C
解析 句意为：这个计划目前正在审议中。under consideration在考虑中，符合句意。
4. unless从句
（1）Owen wouldn’t eat anything______________________. 欧文不会吃任何东西，除非他自己做的。
【答案】unless he cooked it himself
（2）Don’t ask me to explain you really don’t understand.
A．unless B．until C．if D．when
【答案】答案 A
解析 句意为：不要让我解释，除非你真的不明白。unless连词，意为“除非”。
（3） he has any objections，we will carry out the plan.
A．If B．Unless
C．Until D．That
【答案】答案 B
解析 句意为：除非他反对，否则我们将执行这一计划。unless连词，意为“除非，如果不”。
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