单选题：John removed his overcoat.

题目内容：

John removed his overcoat. A．took away
B．left aside
C．took off
D．washed off

参考答案：

答案解析：

Jack is a diligent worker.

Jack is a diligent worker.A．ambitious B．lazy C．hardworking D．clever

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The girl felt shy and uneasy when she was asked to answer the teacher's questio

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Come out, or I'll burst the door down.A．shut B．set C．break D．beat

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We need to identify the potential problem.A．main B．possible C．immediate D．common

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