题目

The teacher often requires us ________ make any noise in class.A. to try not to B. not try toC. not to try to D. try not to 答案：【答案】A【解析】试题分析：句意：老师经常要求我们尽力地不要在课上发出噪音。此题考查固定短语require to do sth需要做某事和try not to do sth尽力不要做某事。根据句意，应选A。胃呈囊状，可暂时贮存食物。 [     ]