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18._____ arriving at the station,the Queen was welcomed by t

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18._____ arriving at the station,the Queen was welcomed by the I
A) At B) For
c) On D) In
19.Tom used to live in California,_____
A) used he B) did he
C) was he D) didn't he
20.So far there is no proof ______ people from other planets do exist.
A) which B) how
C) what D) that
21.At first I wasn't used ______ when I did something wrong.
A) to criticize B) to be criticized
C) to criticizing D) to being criticized
22.Never before ______so highly successful in changing his surroundings.
A) man has been B) man is
C) has man been D) is man
23.He often falls asleep while ______ television.
A) watching B) to watch
C) watched D) watch
24.______ from the helicopter,the city looks very beautiful.
A) Seeing B) Having seen
C) Seen D) To see
25.Not until many years later,______ known.
A) was the whole truth become B) did the whole truth become
C) the whole truth became D) the whole truth had become
18. C
on/upon doing sth 一...(就...)
19. D
used to可用两种否定:usedn't或didn't
20. D
that引导同位语从句,解释proof的具体内容;且that在该从句中不充当任何成分,只起引导作用
21. D
从句意上看,是“习惯于”即:be used to doing sth;又是被动语态,即“被批评”,所以结合成:be used to being done
22. C
否定词never提前到句首,则该句采用部分倒装;从时间状语before看,用现在完成时最好.
原句正常句序:Man has never been so highly successful in changing his surroundings.
23. A
状语从句的省略: while watching television=while he was watching television
24. C
句子主语是the city,它和动词see是被动的关系,“城市从直升机上被看”,所以用过去分词短语做状语表被动关系
25. B
含否定词not until的短语提前只句首,该句采用部分倒装;时间状语many years later表明本句是一般过去时,所以把did提前
本句正常句序是:The whole truth didn't become known until many years later.