In the final exam of last term, our maths teacher Mr.Wu gave us _______

In the final exam of last term, our maths teacher Mr.Wu gave us  ________we all couldn’t work out .

#33849

such a difficult problem that

so a difficult problem as

so difficult a problem that

as difficult a problem as

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English is not easy _____.

#33480

learning

to learn

to be learned

learned

_____ the old man’s sons wanted to know was ____ the gold had been hidden.

#31851

What; where

That; what

What; that

That; which

The farmer used wood to build a house ________ to store grain.

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that

in which

which

what

No government can justly claim authority    it is based on the will of the people．

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after

unless

so that

while

There are no easy answers to questions brought to us by the rapidly changing world,        we can try to turn challenges into opportunities．

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but

for

then

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