用本单元所学词汇的正确形式完成句子．

You aren't ________ to buy alcohol．(你才14岁，不到买酒的年龄)

用本单元所学词汇的正确形式完成句子．

John ________ television for hours at a stretch．(约翰非常满足于一连几小时不停地看电视)

用本单元所学词汇的正确形式完成句子．

We ________ in the middle of our telephone conversation．(我们正交谈时，线路被切断了)

用本单元所学词汇的正确形式完成句子．

It was a good concert－I enjoyed the last song ________．(我尤其喜欢最后的那首歌)

用本单元所学词汇的正确形式完成句子．

The population has not ________(增长)so fast as before．

用本单元所学词汇的正确形式完成句子．

________ as it freezes．(水结冰时会膨胀)

用本单元所学词汇的正确形式完成句子．

At least, the train runs ________ the boat(火车的速度至少是小船速度的6倍)．

用本单元所学词汇的正确形式完成句子．

________ is ________(节约即是收入)．

用本单元所学词汇的正确形式完成句子．

After the New Year's bell, they ________(开始交换礼物)．

完成句子(Structure Use)

用本单元所学词汇的正确形式完成句子．

She used to ________(梦想成为)a famous singer, but she gives it up now．