Unit 3 Inventors and inventions grammar课时作业

　　一、打牢语言基础，基稳才能楼高

　　Ⅰ.单词拼写

　　1．She dared (敢于) not breathe a word of it to anybody.

　　2．The performance given at the Golden Hall of Vienna yesterday was awesome (令人惊叹的) and moving.

　　3．This piece of string (细绳) is too short to pack up the luggage, and let me join another piece on to it.

　　4．Spring is drawing near because I see the flowers in my backyard disclose their colors with a butterfly (蝴蝶) flying on them.

　　5．We should seize (抓住) any opportunity to improve our oral English when possible.

　　6．He works from dawn (黎明) till dark without having a rest.

　　7．I hope we can finish this before the deadline (最后期限)．

　　8．The past 20 years has witnessed (见证) great changes in Shenzhen.

　　9．He is as stubborn (顽固的) as a donkey, and he can't change his mind.

　　10．Then came the disturbing (令人不安的) news that the newly born baby was seriously ill.

　　Ⅱ.单项填空

　　1．The reason why the goods are sold at such low prices is that the manufacturers are willing to ________ prices in return for big volume of purchases.

　　A．cast down　　　　　　 　B．break down

　　C．settle down D．bring down

　　解析：选D　句意：货物被以如此低的价格卖出的原因就是厂商愿意降低价格来换取大批量的采购。bring down"降低"，符合句意。cast down"使沮丧"；break down"分解"；settle down"安定下来"。

　　2．-He ________ love with Mary for 8 years up till now.

　　-They'll get married sooner or later.

　　A．has fallen in B．has been in

　　C．fell in D．is in

　　解析：选B　句意："到目前为止，他与玛丽相爱8年了。""他们迟早会结婚的。"fall in love with强调动作，不与表示时间段的状语连用；be in love with表示状态，可与表示时间段的状语连用，排除A、C两项；根据时间状语up till now可知用现在完成时，故选B。

3．-How was your holiday?