1. 语态和时态 —Do you see those people on the little sandy island? —Yes, they _______ handkerchiefs for the last half hour. I wonder why. A. were waving B. waved C. had waved D. have been waving 【正确答案】D 【高考考点】考查动词时态。现在完成进行时：表示一个从过去某一时刻开始的动作，一直延续到说话时还在进行或刚...