问题补充：
Our teacher is coming. Please stop and keep .
A. talking; quiet
B. to talk; quiet
C. talking; quietly
D. to talk; quietly
答案：
(答案→)A. talking; quiet
B. to talk; quiet
C. talking; quietly
D. to talk; quietly
解析：考查固定搭配。Stop to do sth.停下来开始做另一件事；stop doing sth.停止做某事；根据句意，应是老师来了。请停止讲话，保持安静。所以第一空用talking;keep后跟形容词，表示保持某种状态。所以选A。
