--Tom,everybodywasinthehallexceptyouthismorning.--Sorry,butI________my

发布时间：2020-08-06 04:43:40

--Tom, everybody was in the hall except you this morning.--Sorry, but I ________ my parents water the flowers in our garden.A.am helpingB.was helpingC.helpedD.helped

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B解析由上句话而知，help发生在过去某个时间，所以用过去进行时。
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