题目

Standing on the top of the hill, I would not do anything but _____ the flowing of the smog around me.A. enjoy                       B. enjoying                  C. enjoyed                   D. to enjoy 答案：A解析：but用作“除了”解,当其前含有实义动词do时, 则but后的不定式短语要省去to。　　We must help ________ when they are in trouble（处于困难）. 　　A. others　　　　　　　　　　　　　　　　    B. other　　　　　　　　　　　　　　　　　　  C. another