As the sea ice melts sooner each swimmer,polar bears are forced to come ashore earlier and face food shortages _____ they have stored enough fat to last them through the season.
A．beforeB．unlessC．sinceD．until
A
本題考查連詞。句意：因?yàn)楹１诨帽扔斡菊咴�，北極熊沒來得及為整季儲存足夠的脂肪，就被迫提前上岸，面臨食物短缺。before conj.在……之前；比……早些。
練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：不詳 題型：單選題

______I understand your viewpoint, I don’t agree with it.
A．UnlessB．SinceC．BeforeD．While

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

He likes to help others ________ he is very busy.
A．becauseB．if C．even D．even if

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

You will succeed in the end ____ you give up halfway．
A．even ifB．a(chǎn)s thoughC．a(chǎn)s long asD．unless

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

—Do you think the weather will be all right this summer?
—No, _____ we are lucky. The newspaper says it'll be very hot anyway.
A．ifB．thoughC．unlessD．a(chǎn)s

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

They want a house,            we would rather live in a flat.
A．a(chǎn)ndB．whereasC．soD．when

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Leave your key with your neighbor      _you lock yourself out one day.
A．a(chǎn)s long asB．in case C．even thoughD．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

After two hours of hiking, we finally reached _______ Tom thought was the best place to camp.
A．whereB．whichC．whatD．that

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

_____ you are in a speech contest or you are giving a talk in class, a little preparation will make your presentation organized and dynamic.
A．EitherB．On condition thatC．No matterD．Whether

查看答案和解析>>

同步練習(xí)冊答案