阅读下面短文，根据所给语境，按要求完成下列各题。

　　It may seem strange that ice itself can sometimes protect crops from frost(霜). 1 Some growers actually spray(喷洒) their crops with water on a freezing night. Water freezes quickly on the plants and then a strange thing happens. 2 As long as ice stays wet, it can't get colder than 0℃, a temperature many plants can survive(存活) at. If the ice ever became completely frozen and dry, it might drop many degrees lower, destroying the plants. 3 By continually spraying water on the ice, the growers keep it from going below 0℃ even if the air is much colder. This may be unbelievable, but it saves the plants.

　　This strange kind of ice blanket(毯子) works only on plants that are strong enough to stand the weight of frozen spray. This method is even used to protect banana plants on some Central American Plantations(种植园).

[　　]

A．将1处用被动语态改写。

1．________________________________

B．将2处用if改写。

2．________________________________

C．将3处翻译成汉语。

3．________________________________

D．完成下列句子。

4．The method of using an ice blanket to protect crops from frost is applicable to(适用于)________________

(改为被动语态)Did he do his homework last night?

　　______ his homework ______ by him last night?

完成句子
【小题1】当我一个人在家时，我时不时地感到孤独。
【小题2】新机场投入使用已经有一年多了。
【小题3】春天是参观中国园林的最好时间。
【小题4】这一课程涉及很多主题，包括旅游和宾馆。（用被动语态）
【小题5】一天，他躺在草地上，不知不觉睡着了，并且做了一个奇怪的梦。

1.请注意听老师讲。

2.采访老师一定很有趣。

3.去年她在衣服上花了很多钱。

4.对我们来说有必要学会团队精神。

5.应该邀请更多的人参加慈善演出。（用被动语态）

完成句子

1.当我一个人在家时，我时不时地感到孤独。

2.新机场投入使用已经有一年多了。

3.春天是参观中国园林的最好时间。

4.这一课程涉及很多主题，包括旅游和宾馆。（用被动语态）

5.一天，他躺在草地上，不知不觉睡着了，并且做了一个奇怪的梦。