1.I am sorry,but I have a lot of () to do this evening.A.working B.homeworks C.homework D.housewor

1.I am sorry,but I have a lot of () to do this evening.A.working B.homeworks C.homework D.housewor
2.People () live without air.
A.don't B.can C.can't D.do
根据句意及首字母提示完成单词
3.Two h----- teachers will give us a lecture.
4.They like having s---- lessons very much.
5.The teacher is t----- with his mother about his study.
用括号中所给单词的适当形式完成下列句子
6.Billy looks upset.What happened to ()?(he)
7.Don't throw the old watch away.It is still ().(use)