紧跟课本章节作业练习，也可作为定时训练
Unit1课时作业(一)
Ⅰ.介词填空
1．The goods can be lifted ________ means of a crane.
[答案] by
2．In the nursing profession, women are ________ the majority.
[答案] in
3．I can't imagine how he can live ________ ￡ 5,000 a year!
[答案] on
4．________ the time we arrived at the airport, the plane had already taken off.
[答案] By
5．The old man made a life ________ begging.
[答案] by
6．The committee elected him ________ their representative.
