Module 2 第一课时
Ⅰ.根据下列各句句意及所给单词的首字母，写出该单词的正确形式
1．Some people start taking d________， because they think they will lessen their stress and renew their energy.
2．Research has shown that smoking is the main cause of lung c________.
3．Once you are a________ to smoking, you'll find it difficult to give it up.
4．Because of doctors' timely treatment, Mary's mother was out of d________.
5．A painkiller was i________ into his foot before the operation.
6．It is recognised that something must be done to r________ air pollution.
答案：1.drugs 2.cancer 3.addicted 4.danger 5.injected 6.reduce
Ⅱ.用适当的介词填空
