Unit 3 Inventors and inventions课时作业

learning about language

Ⅰ.单句语法填空

　　1．Only when he arrived ________the meeting begin.

　　答案：did　"only＋状语(从句)"位于句首，句子要部分倒装。由时间状语从句when he arrived可知，应用一般过去时，故填did。

　　2．Neither I nor John ________(be) tired of the speech. It is interesting.

　　答案：is　neither ... nor ... 连接两个并列主语，谓语动词的数遵循"就近一致"原则，故填is。

　　3．________(absorb) in writing a letter, he didn't even look up when I came in.

　　答案：Absorbed　be absorbed in ..."全神贯注于......"，此处为分词作状语，故填Absorbed。

　　4．That you ________(expose) to the sunlight for too long will be harmful to your skin.

　　答案：are exposed　be exposed to ..."暴露于......；接触......"。

　　5．There is no sense in ________(worry) about the future.

　　答案：worrying　There is no sense in (doing) sth. "(做)某事是没有意义的"。

　　6．While ________(attend) to the central task, we should unfold the work in other fields.

答案：attending　attend to "处理；照料"，从句的主语和主句主语一致，且谓语部分含有be动词的相应形式时，可省略从句中的主语和be动词，补充完整为：While we are attending to ...，故