Module 6 Let's look back - 第2课时
一、1．A mouse(老鼠)和 lion(狮子)都是表示动物的单词，net(网)是表示物品的单词。
2．C laugh(大笑)和 ask(问)是动词，happy(快乐的)是形容词。
3．B tooth(牙齿)和tail(尾巴)是名词，free(使……自由)是动词。
4．C say(说)和tell(告诉)是动词，mountain(山脉)是名词。
5．C go (去)和eat(吃)是动词，famous(著名的)是形容词。
二、1．A 2．C 3．D 4．B
三、1．C 由in 1993(在1993年)可知句子时态是一般过去时，谓语动词应用过去式。
2．B try to do sth．意为“努力做某事”，只有B选项符合语法。
3．When 本题就时间提问，疑问词可用when。
4．He became president of South Africa in 1994．
5．Let's see many places of natural beauty．
四、1．share with others 由“In the restaurant，we shouldn't talk with our mouths full．We should share with others．”可知。
2．talk with our mouths full 由“In the restaurant，we shouldn't talk with our mouths full．”可知。
3．wait in line 由“At the airport，we should wait in line．”可知。
4．smoke or throw things 由“At the airport，we should wait in line．We shouldn't smoke or throw things．”可知。
5．keep quiet 由“In the museum，we should keep quiet．”可知。
6．talk loudly 由“In the museum，we should keep quiet．We shouldn't talk loudly．”可知。