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【单选题】
Mr. Brown is very old. He is now over 80 years old. Two years ago his white hair began to fall out soon more and more hair fell out and now he is completely bald.A.
white
B.
hairless
C.
gold
D.
old
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【单选题】Only after I had known him for some time______to appreciate his real worth.
A.
do I begin
B.
did I begin
C.
I began
D.
had I begun
【单选题】______I’d have told you. [ ]
A.
If I would have known it
B.
Had I known it
C.
If I had have known it
D.
should I know it
【单选题】If I ____ more about diamond, I ____ cheated by that man.
A.
had known, would not be
B.
had known; wouldn’t have been
C.
knew; would not have been
D.
had known; would never be
【单选题】______, I'd have told you. [ ]
A.
If I would have known it
B.
If I had have known it
C.
Had I known it
D.
Should I know it
【单选题】选择正确的处理步骤：( )当检索返回的网页较少或着没有匹配的信息时，可按照下面方法进一步处理：①换一种搜索工具试一下，每种搜索工具的检索方式和所拥有资料的侧重点不同。②检查关键词的拼写是否有误，关键词组合是否有自相矛盾的地方。③将用某些关键词用更常见的同义词替代后重新进行搜索。
A.
①②③
B.
②③①
C.
③②①
D.
③①②
【单选题】If only I __ how to operate a computer as you do.
A.
had known
B.
would know
C.
should know
D.
knew
【单选题】Only when I put myself in their position ________ they were more miserable than me.
A.
I had known
B.
had I known
C.
I knew
D.
did I know
【单选题】______ I’ve told you.
A.
If I would have known it
B.
If I had have known it
C.
Had I known it
D.
Should I known it
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