【題目】There's no way of knowing why one man makes an important discovery ________ another man, also intelligent, fails.
A.since
B.if
C.as
D.while

【答案】D
【解析】根據(jù)句意，前后兩句話為兩種情況的對比：為什么一個人會做出一個重要的發(fā)現(xiàn)而另一個人，也很聰明，但是失敗了。并列連詞while表示對比。故選D。

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 still remember my first teacher we haven’t seen each other for many years

A．for B．because C．since D．though

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】After two years' research, we now have a ______ better understanding of the distance.
A.very
B.fairly
C.far
D.quite

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】Though ________ behind and feeling awkward, Jack kept on running until he reached the

finishing line.

A. leaving B. having left C. left D. being left

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】-- I heard that there are a few seats left for tonight's show.
-- Really? I was under the impression ______ they were sold out a long time ago.
A.what
B.which
C.that
D.where

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】The park was full of people_________ themselves in the sunshine.
A.having enjoyed
B.enjoying
C.enjoyed
D.to enjoy

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】Reminded that her family would move out of the familiar neighborhood, the little girl _______ from head to toe the whole night.

A. has shaken B. was shaking

C. had shaken D. is shaking

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】Traditionally, college students hold a graduation ceremony to encourage themselves when they are to _________ on their life journey.

A. set up B. set off C. set about D. set down

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】Such poets as Shakespeare ______ widely read, of whose works, however, some ______ difficult to understand.

A．a(chǎn)re; are B．is; is

C．a(chǎn)re; is D．is; are

查看答案和解析>>

同步練習(xí)冊答案