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She ______ very hard since she came to our school.

A．studies	B．has studied
C．is studying	D．studied

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—May I speak to the headmaster?
—He’s not here．He _______ Beijing．Can I take a message?

A．has gone to

B．has been to

C．has gone

D．has been

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Ann is a careful girl．She always goes over her exercises to ____ here are no mistakes．

A．look for

B．make sure

C．find out

D．think about

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Your iPad is quite nice． Where did you buy ______? I want to buy ______, too．

A．one ; one

B．it ; one

C．it ; it

D．one ; it

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______ difficult questions they are! I can’t answer them．

A．How

B．How a

C．What

D．What a

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He left in ______ a hurry that he forgot ______ the door．

A．so; locking

B．so ; to lock

C．such; locking

D．such; to lock

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