---We’ve seen many more days of blue skies recently.
　 ---True. But back in 1998, ________ Beijing started its “Defending the Blue Sky”　　　　　program, the city only ________ about 100 days a year.　　
A．which, seesB．that, saw C．when, saw D．a(chǎn)nd, seeing
C
回到1998年，那時北京開始了保衛(wèi)藍色天空項目，這個城市大概只有一百天的晴空。考查非限制性定語從句，根據(jù)1998年，應(yīng)為過去式。
練習冊系列答案
相關(guān)習題

科目：高中英語 來源：不詳 題型：單選題


Henry must have stayed up last night, ________ he looks so tired and sleepy.
A．forB．a(chǎn)sC．thoughD．since

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題


－What are you going to do this afternoon?
－ I’ll probably go for a walk later on______it stays fine.
A．so long as
B．a(chǎn)s far as
C．even if
D．a(chǎn)s if

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題


Many people say they love birds, but some plant trees _________ some make cages.
A．untilB．thoughC．unlessD．while

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題


-- Will you lend your MP4 player to Jack?
-- Yes, ________ he promises to return it on time.
A．a(chǎn)s soon asB．a(chǎn)s well asC．a(chǎn)s long asD．a(chǎn)s far as

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題


. The concert was a great success--there wasn’t a single empty seat in the concert hall, ____ it was very cold.
A．becauseB．whenC．unlessD．a(chǎn)lthough

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題


A warm thought came to me      I might use the pocket money to buy some flowers for my mother’s birthday．
A．ifB．whenC．thatD．which

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題


It is the hotel _________located in the downtown _________he applied to for a job.
A．that; thatB．which; thatC．that; whereD．/; that

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題


My key is gone. Have you seen it anywhere?  
– Oh, it is in the room _______ we had a talk last night  
A．thatB．whichC．whereD．what

查看答案和解析>>

同步練習冊答案