④Many passengers were badly ________ in the accident.

⑤He fell down and ______ his arm.

Keys:①harm②wounded③hurt④injured⑤hurt

2）cause/excuse/reason n.理由

【解释】

cause指造成一种影响、结果或后果的原因或条件。（与of连用）

excuse 强调为逃避或减轻责任而设法辩解而使用的借口，理由（与for连用）

reason是指解释某种效果的发生或性质的措辞（与for连用）

【练习】选择cause/excuse/reason并用其适当的形式填空。

①There was no obvious ________ for the accident.

②Sometimes most students will make up a(n) _________ for their absence.

③The ________ she went to Guangzhou was the climate.

④Carelessness is the ________ of his failure.

Keys:①reason ②excuse③reason④cause

3）electric/electrical adj.电的

【解释】

electric 用于修饰需要用电来运转的设备或用于比喻"震惊"

electrical 常用于表示与电气性质或科学相关

【练习】选择electric或electrical并用其适当的形式填空。

①Many _______ fans are required in such a large meeting room.

②The room became ________ with amazement.

③To be an ________ engineer is the dream of many boys.

Keys: ①electric ②electric ③electrical

4）jewelry/jewel n.珠宝

【解释】

jewelry 珠宝，珠宝类的总称[不可数名词]

jewel珠宝[可数名词]

【练习】选择jewelry或jewel并用其适当的形式填空。

①The ______ of the rich were often kept in the bank.

②She locked her_________ in the _________ box.

Keys:①jewels ②jewels; jewelry

1）aid n．& vt. 帮助；援助；资助

[经典例句] I couldn't speak any French, but a nice man came to my aid and told me where to go.