题目内容

There ____ some clouds in the sky.

A. be
B. is
C. are
D. am

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--Where ___ the ship ____? --It is going under the bridge.

A. is; go
B. does;go
C. is;going
D. is; goes

什么是短视频?

短视频的特点是什么?

短视频营销的优势有哪些?

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