It has been warned that        to the surroundings with people infected by Covid-19 without any

protection can lead to severe result.

being exposed

exposed

having exposed

to expose

考查非謂語動(dòng)詞。句意：有人警告稱，在沒有任何保護(hù)措施的情況下，暴露在有感染 Covid-19的人環(huán)境中會(huì)導(dǎo)致嚴(yán)重的結(jié)果。分析句子結(jié)構(gòu)可知expose在句中應(yīng)用非謂語動(dòng)詞形式，表示“暴露”短語為be exposed to,且從句中缺少主語，expose 與主語people是被動(dòng)關(guān)系，故應(yīng)用動(dòng)名詞的被動(dòng)式作主語。故選A項(xiàng)。

Writing out all the invitations by hand was more time-consuing than we             .

will except

are  excepting

except

had excepted

考查時(shí)態(tài)。句意：手工寫下所有的邀請(qǐng)函要比我們預(yù)料的花去更多的時(shí)間。根據(jù)句意可知我們預(yù)料是在實(shí)際上寫之前發(fā)生的，而本句中實(shí)際寫花去的時(shí)間使用了過去時(shí)was，所以expect用過去完成時(shí)。故D項(xiàng)正確。

What some people regard as a         is seen as a plus by many others.

duty

drawback

failure

faith

考查名詞詞義辨析。句意：一些人認(rèn)為是一個(gè)缺點(diǎn)，而其他許多人則認(rèn)為這是一個(gè)優(yōu)點(diǎn)。A.duty責(zé)任；B.drawback缺點(diǎn)； C. failure 失?。籇. faith信念。根據(jù)空后plus“優(yōu)點(diǎn)”可知，空處需用drawback“缺點(diǎn)”與之對(duì)應(yīng)。故選B項(xiàng)。

They elected him          captain of the team for         second time.

the; a

a; the

a; a

/; a

考查冠詞的用法。句意：他們?cè)俅芜x他當(dāng)隊(duì)長(zhǎng)。職位，官銜前面不加冠詞，a second time表示“又一次，再次”；the second time表示第二次（順序）。故選D項(xiàng)。

As crossing

While you cross

While crossing

Cross

這題考查時(shí)間狀語從句的省略式，當(dāng)主從句的主語一樣時(shí)，可以省略從句的主語和be動(dòng)詞，這題的while crossing就省略了you are，句意是：當(dāng)你過馬路時(shí)，別忘了兩邊看看。選C。

You must have had some moments when you were disappointed. If so, how           you deal with them?

will

did

can

do

考查動(dòng)詞的時(shí)態(tài)和語態(tài)。句意：你一定有過失望的時(shí)候。如果有，你是怎么處理的？must have done 表示對(duì)過去的事情的推測(cè)?？芍獣r(shí)態(tài)為一般過去時(shí)。在特殊疑問句中助動(dòng)詞應(yīng)用did。故選B項(xiàng)。

There's no simple solution          this problem.

of

for

to 

about

考查介詞。句意：這個(gè)問題沒有什么簡(jiǎn)單的解決方法。此處是短語“

the solution to....的解決方法”，應(yīng)用介詞to。故選C項(xiàng)。

It was not until 1920 ___ regular radio broadcasts began.

when

which

that

since

此題考查強(qiáng)調(diào)句。句意為：直到1920年，常規(guī)的電臺(tái)才開始。這句話把it is/was和that去掉后，仍是完整的一句話，因此我們可以知道這是一個(gè)強(qiáng)調(diào)句，而且是對(duì)not...until“直到...才”的強(qiáng)調(diào)。結(jié)構(gòu)是：it is/was+not until+其他成分。故選:C.