I did't know you ___type so quickly.A must B can C need D could为什么选D

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I did't know you ___type so quickly.A must B can C need D could为什么选D
I did't know you ___type so quickly.A must B can C need D could
为什么选D

I did't know you ___type so quickly.A must B can C need D could为什么选D
宾语从句,主句部分是过去时态,从句也要相应的变过去

D
能够,同时考虑过去式,因为前面是didn't

1. can
(1)表示能力.例如:
Can you swim?你会游泳吗?
He can speak both English and French.他会讲英语和法语。
I can’t lift that box.我提不起那箱子。
(2)表示允许(跟may的意思相近)。例如:
You can go now.你们现在可以走了。
Can I h...

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1. can
(1)表示能力.例如:
Can you swim?你会游泳吗?
He can speak both English and French.他会讲英语和法语。
I can’t lift that box.我提不起那箱子。
(2)表示允许(跟may的意思相近)。例如:
You can go now.你们现在可以走了。
Can I hand in the exercise book tomorrow?明天我再交练习本行吗?
(3)表示可能性。例如:
Can you go with us?你跟我们一起走吗?
Wood can be made into paper.木材可以造纸。
(4)表示怀疑、猜测、惊异(主要用于否定句或疑问句中)。例如:
——Someone is knocking at the door.有人敲门。
——Who can it be?Can it be Ling Feng?会是谁呢?难道是凌峰?
That man can’t be our headmaster。Our headmaster has gone to England.那个人不可能是我们的校长,我们校长去英国了。
2.could
(1)could是can的过去式,表示过去有能力及过去存在的可能性。例如:
He couldn’t go that day .那天他不能去。(可能性)
She asked if she could keep the book for another two days.她问那本书她是否可以再借两天。(可能性)
He couldn’t answer all the questions.不是所有的问题他都能回答。(能力)
(2)表示委婉地提出问题或陈述看法(现在时)例如:
Could I speak to Mr Zhang,please?(电话里)请找张先生接电话好吗?
(3)表示惊异、怀疑、不相信。例如:He couldn’t be a thief.他不可能是个小偷。
How could he be so silly?他怎么会这么傻?
3.May
(1)表示询问或说明一件事可不可以做。例如:
You may come here whenever you like.你想什么时候来就什么时候来。
表示客气或委婉的请求用May,回答是也用May就显得冷淡。所以最好改用热情的答语。例如:
——May I smoke here?我可以在这里吸烟吗?
——Yes,please./Certainly.可以./当然可以。若用Yes,you may.给人一中勉强的感觉。
(2)表示某事可能发生。例如:
She may be right.她可能是对的。

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