during的用法They __ nothing to heip the homeless girl during the last school year.A have done B did C do D had为什么A为正确答案?during到底是现在完成时的标志词,还是一般现在时的?(打错了)
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![during的用法They __ nothing to heip the homeless girl during the last school year.A have done B did C do D had为什么A为正确答案?during到底是现在完成时的标志词,还是一般现在时的?(打错了)](/uploads/image/z/11814455-47-5.jpg?t=during%E7%9A%84%E7%94%A8%E6%B3%95They+__+nothing+to+heip+the+homeless+girl+during+the+last+school+year.A+have+done+B+did+C+do+D+had%E4%B8%BA%E4%BB%80%E4%B9%88A%E4%B8%BA%E6%AD%A3%E7%A1%AE%E7%AD%94%E6%A1%88%3Fduring%E5%88%B0%E5%BA%95%E6%98%AF%E7%8E%B0%E5%9C%A8%E5%AE%8C%E6%88%90%E6%97%B6%E7%9A%84%E6%A0%87%E5%BF%97%E8%AF%8D%EF%BC%8C%E8%BF%98%E6%98%AF%E4%B8%80%E8%88%AC%E7%8E%B0%E5%9C%A8%E6%97%B6%E7%9A%84%EF%BC%9F%EF%BC%88%E6%89%93%E9%94%99%E4%BA%86%EF%BC%89)
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