Ifyouaregoingtobeacomputerprog

If you are going to be a computer programmer， you'd better start with the ABCof computers．（　　）

A．English grammarB．English letters

A．

the difficulties

B．

the basic knowledge

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﹣Sure．He is my uncle．（　　）

A．

whose

B．

which

C．

who

D．

whom

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﹣Sorry，he isn't here．He _______ to Guiyang on business．

A．

have gone

B．

has gone

C．

have been

D．

has been

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﹣By air．（　　）

A．	when you	B．	when do you
C．	how you	D．	how do you．

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A．	turn off	B．	turn on
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