根据下面句子的意思及所给的汉语提示，写出空缺处单词、固定短语或固定搭配的正确形式。

This is our ________(三)time to plant trees．

Don’t put off today’s work for tomorrow．I mean, today’s work ________ today．

A．may do

B．must do

C．may be done

D．must be done

按照所给汉语意思完成句子，注意语法正确，意思完整，词数不限。

夏天到了，天气正变得越来越热了。

It is getting ________ when summer comes．

按照所给汉语意思完成句子，注意语法正确，意思完整，词数不限。

一方面，我们要学习好；另一方面，我们应该保持身体健康。

________, we should study well; on the other hand, we ________ keep healthy．

按照所给汉语意思完成句子，注意语法正确，意思完整，词数不限。

他是个篮球好手，他加入这个俱乐部两年了。

He is a good basketball player．He ________ in the club for two years．

按照所给汉语意思完成句子，注意语法正确，意思完整，词数不限。

听到这令人兴奋的消息，他睡不着了。

When he ________ news, he couldn’t sleep．

按照所给汉语意思完成句子，注意语法正确，意思完整，词数不限。

即使遇到很多的困难，我们永远不会放弃希望。

Even if we meet with many difficulties, we will never ________ hope．

完成句子，使改写后的句子完整，并与原句意思相符，注意每空只填一个单词。

How about having some fish for supper today?

________　________　________ some fish for supper today?

完成句子，使改写后的句子完整，并与原句意思相符，注意每空只填一个单词。

They plant a lot of trees in our hometown every year．

A lot of trees ________　________ in our hometown every year．

完成句子，使改写后的句子完整，并与原句意思相符，注意每空只填一个单词。

The girl had to look after her grandmother when her parents were out．

The girl had to ________　________　________ her grandmother when her parents were out．