题目

—Are you ready for the competition? —Yes.We ________ to beat all the other teams and win the first prize. A. are determined              B. have determined C. are determining             D. determined   答案：A由语境可知此处时态为一般现在时，故排除B、D两项。be determined to do sth.在此处意为“有决心干某事”，指状态；C项表动作，不合语境。  如图，已知线段a．           （1）用尺规作一条线段AB，使AB等于2a．（2）延长线段BA到C，使AC等于AB．