The rocket must go a speed fast enough to escape the pull the earth, otherwise it will fal——青夏教育精英家教网—

摘要： The rocket must go a speed fast enough to escape the pull the earth, otherwise it will fall back the earth.

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The rocket must go 　　 a speed fast enough to escape the pull 　　 the earth, otherwise it will fall back 　　 the earth.

介词、副词填空

The rocket must go 　　 a speed fast enough to escape the pull 　　 the earth, otherwise it will fall back 　　 the earth.

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