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According to scientists, our mental abilities begin to from the age of 27 after reaching the highest level at 22.

A．differ

B．increase

C．develop

D．decline

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Snow is rare in this area. You can hardly see any snow, ________ it is winter.

A．ever since	B．now that
C．even though	D．even so

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The prices have been rising all the time, especially that of housing. So it is high time the government _______ action to solve it.

A．takes

B．have taken

C．took

D．to take

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— So much work needs to be finished in such a short time.
— _________ I’ll give you a hand.

A．Not to worry.	B．So what?
C．You can’t be too careful!	D．That’s right.

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________ no modern technology, the Egyptians had to move each stone by hand.

A．It being

B．There being

C．There was

D．Being

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No sooner ________ at the airport than she was surrounded by the reporters.

A．had the star arrived	B．the star had arrived
C．has the star arrived	D．the star has arrived

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