题目

The teacher asked us nottoo much time playing computer games. A. spend                     B. to spend     C. take                 D. to take 答案：B。考查固定搭配。句意: 老师要求我们不要花费太多时间玩电脑游戏。ask sb. not to do sth. “要求某人不要做某事”; spend(time)doing sth. “花费时间做某事”。果园里共有果树140棵，其中苹果树与桃树的比是2：3，桃树与梨树的比是4：5．这三种果树各有多少棵？