用单词的适当形式填空：
1.Which is much_____(far) from the earth, the sun or moon?
2."9.11”______(can not forget) by the people all over the world.
3.It is not polite _____(laugh)at people.
4.The old man was quite weak,so he___(must look after).
5.Neither of you _____(be)right.
6.There are trees on both___(side) of the street.
7.Both of them___(be)student.
8.The farmers are busy_____(get) ready for the next year.
1.farther
2.can not be forgotten
3.to largh
4.must be looked after
5.is
6.sides
7.are (student 是不是打错了，应该是students)
8.getting
1.further 比较级
2.can not be forgotten 被动时态用过去分词
3. to laugh （it's （not）polite to do sth.句式）
4. must be looked after （需要被照顾，是被动时态，用过去分词）
5. is (neither of 后面加单数形式)
6. sides ( both后跟复数)
7. are (同6)
8.getting （be busy doing sth.）
1、farest
2、can't be forgot
3、to laugh
4、must be looked after
5、were
6、sides
7、are
8、getting
1.farthest
2.can't be forgotten
3.to laugh
4.must be looked after
5.is
6.sides
7.are
8.getting