选择填空：The boys are _____across the field.
A.run B.runs C.running
人气：499 ℃ 时间：2020-01-30 01:00:34
解答
The boys are _running____across the field
男孩正在原野奔跑.
因为原句为现在进行时,则are+doing
run的现在分词running
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