—May I leave before 4 o"clock in the afternoon
—No, I"m afraid you ______.
A. mustn"t B. needn"t C. shouldn"t

单项选择题We all know that ice ______.A. feel cold B. is feeling cold C. feels cold

单项选择题Tom was very hungry, ______ he ate all the cakes.A. and B. so C. but