Don't forget            the letter for me when you pass  by the post office.

post

to post

posted

posting

考查不定式作宾语。句意：你经过邮局时别忘了替我寄这封信。forget to do sth忘记要做某事；forget doing sth 忘记做过某事。根据句意表示事情已经发生。故选B项。

           is reported in the newspaper, the epidemic situation is getting better now in China.

It

As

That

What

考查定语从句。句意：正如报纸上报道的那样，中国的疫情正在好转。分析句子结构可知，空格处引导一个非限制定语从句，先行词是整个主句内容，关系词在从句中做主语，表示“正如”，应用as引导，as 引导非限制性定语从句 ，位置比较灵活，可放在主句前。故选B项。

The salesman scolded the girl caught         and let her off.

to have stolen

to be stealing

to steal

stealing

考查非谓语动词。句意：这个销售员责备了被抓住正在偷东西的女孩，然后，让她走了。分析句子结构，caught是过去分词作定语，修饰前面的名词 the girl,"女孩"和"偷东西"之间是主动关系，用现在分词作宾语补足语，构成catch sb doing sth结构。意为抓住某人正在做某事。故选D项。

Inside the window hangs a         carved out of this piece of wood by the artist.

decoration

destination

departure

discipline

考查名词辨析。句意：窗户边上挂着一幅被艺术家由这块木头雕刻的装饰品。A. decoration装饰，装饰品；B. destination目标； C. departure 离开；D. discipline纪律。窗边应挂着装饰品。故选A项。

—Have you watered the flowers?

I am

I’m going

I’m just going to

I will go

句意为：——你浇花了吗？——没有，不过我正打算浇。I’m just going to.相当于I’m just going to water the flowers。故选C。

As crossing

While you cross

While crossing

Cross

这题考查时间状语从句的省略式，当主从句的主语一样时，可以省略从句的主语和be动词，这题的while crossing就省略了you are，句意是：当你过马路时，别忘了两边看看。选C。

When it comes to modern communication, network safety is always a major          . 

concern

advantage

opportunity

solution

考查名词辨析。句意：当涉及现代通信，网络安全一直是一个主要令人担忧的问题。A. concern关心，令人担忧的事实或情况；B. advantage 优势；C. opportunity 机会；D.solution解决方案。网络安全一直是现代通信的个主要令人担忧的问题。故选A项。

--- I'm afraid I can't complete the marathon next week.

---              ! You have been practicing a lot.

No problem

Go ahead

Cheer up

Good luck

考查交际用语。句意：---恐怕我下周不能完成马拉松比赛。---振作起来！你一直一直在不断练习。A.No problem没问题；B. Go  ahead请干吧；请便吧；C.Cheer up高兴起来；振作起来；D. Good luck祝您好运。由下文可知说话人担心，完不成马拉松比赛，由“你一直不断练习”可推断表示鼓励“振作起来”。故选C项。

The old rules have to be          because they only applied to the circumstances that existed when they were made a hundred years ago.

developed

established

observed

revised

考查动词的辨析。句意：老的规则需要被修改因为它们只适合一百年制定时的状况。A.develop发展；培养；B.establish建立；C.observe观察；D.revise修改，由because they only applied to 可知它只适用于以前，需要修改。故选D项。