英语时态题evey minute of every day,over 20 hectares of tropical forest ___A are being cut down B has cut down C cut down D is cut down选哪个为什么

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• 英语时态题evey minute of every day,over 20 hectares of tropical forest ___A are being cut down B has cut down C cut down D is cut down选哪个为什么
• 英语时态问题If I had noticed it.I would have told you .这句话中用了什么时态.为什么要用这些时态.还少打了一个yesterday在you后面.
• 英语时态的问题Our new English teacher, who is said to have moved back to China, _______in America for almost 10 years. A lived B. has lived C. was living D.had lived 答案选A,为什么不选C呢?过去进行时可以表示过去某段时间内正在进行的动作，为什么这里不能表示过去10年里，一直生活在美国呢？