wangqh2696122 Is "pile up" the only answer? The only answer to what? What is the question?
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wangqh2696122Is "pile up" the only answer?The only answer to what? What is the question?
wangqh2696122I wonder if ""fall down ""is ok to replace pile up .It's OK, but just "fall" is better because we so often use "fall down" to describe what happens when a person slips or stumbles on something. Snow falls. People stumble and fall down.