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單項選擇題

Let me（）the case carefully before I draw a conclusion.

A.look out
B.look into
C.look after

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單項選擇題

More and more people in China now（）to work regularly.

A.drive
B.drives
C.have driven

單項選擇題

The sun heats the earth,（）is very important to living things.

A.that
B.what
C.which

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