【題目】_______ youcansleepwell,youwilllosetheabilitytofocus,planandstay motivatedafter one ortwonights.

A. Once B. Unless

C. If D. When

【答案】B

【解析】考查連詞詞義辨析及語境理解。句意：除非你能睡好，否則一兩個晚上之后，你會失去專注、計劃的能力和保持積極性。A. Once一旦；B. Unless除非；C. If如果；D. When當……時候。故選B。

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源： 題型：

【題目】I am sorry I am very busy now. If I time, I would certainly go to the movies with you.

A. have B. had

C. have had D. had had

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】—I'm sorry I'm late. I gotin the traffic on my way here. —It's OK, we've just started．
A.filled up
B.held up
C.brought up
D.taken up

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】To be honest, she had a great ______ for the small town where she grew up.

A. effectB. effort

C. affectionD. patience

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】The building to which this one is ________ was on fire last night.
A.same
B.similar
C.different
D.alike

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】— I am so glad that I caught you at home. I need your help!
— ____, John?
A.What else
B.So what
C.How come
D.What's up

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】It has been announced that all the students ________ put on masks before going to school in case they are infected with SARS virus.

A. shallB. willC. needD. may

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】—Aren't you going to buy that car? It is modern and comfortable.
—Yes, it is. But I can't ____ such an expensive car now.
A.provide
B.afford
C.offer
D.supply

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】We need to get to the root of the problem ________ we can solve it.
A.while
B.after
C.before
D.as

查看答案和解析>>

同步練習(xí)冊答案