When solving the problem a second time, you’d better be more careful _______

When solving the problem a second time, you’d better be more careful ________ you made a mistake.

#31097

in case

where

in which

that

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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.

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What; where

That; what

What; that

That; which

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

#33160

that

in which

which

what

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

#33969

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．

#31140

but

for

then

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