高考英语必背单词a开头（高考英语核心词汇）

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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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