1 . In our class there are 50 students, ________________________ (其中一半人戴眼镜) . （定语从句）(根据汉语提示完成句子)

2 . ________ _________ (既然) I am free, I can enjoy music for a while. (根据汉语提示完成句子)

3 . He was ________ _________ (经历) a very difficult time. (根据汉语提示完成句子)

4 . The Amazon rainforest fixes carbon and produces more than one fifth of all the earth’s oxygen, __________ (为……输入活力) the planet. (根据汉语提示完成句子)

5 . They let their two-year-old daughter __________________ (挑选她自己的衣服). (根据汉语提示完成句子)

6 . We’d just reached the motorway when__________________(汽油用完了). (根据汉语提示完成句子)

7 . _______________________(在他的指导下), the crew kept good discipline, keeping busy. （根据汉语提示完成句子）

8 . Some scientists also ________________________(有强烈的愿望) explore these themes on a scientific basis. （根据汉语提示完成句子）

9 . ______________________ (没有什么比得上) a good dinner and some music to cheer us up. (根据汉语提示完成句子)

10 . He spoke at the meeting _______________________(代表员工) of the company. （根据汉语提示完成句子）