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單項(xiàng)選擇題

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

A.that
B.what
C.which

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All the team members tried their best. We lost the game,（）

A.as
B.therefore
C.however

單項(xiàng)選擇題

It is very convenient（） here.

A.living
B.to live
C.live

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