from seven to ten應(yīng)該是時(shí)間段(相當(dāng)于for long 之類的),用完成進(jìn)行時(shí)更好些
was doing是用在時(shí)間點(diǎn)上,比如昨晚8點(diǎn)（at eight o'clock yesterday)正在做什么
Mary ------her lessons from seven to ten last night .我覺得是was doing,但是答案是has been doing.
Mary ------her lessons from seven to ten last night .我覺得是was doing,但是答案是has been doing.
英語人氣：755 ℃時(shí)間：2020-03-24 01:39:39
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