It rained heavily, so we _______ stay at home watching TV or surfing the Internet all day. A. could B. had to C. must
—What do you think of Ann? —Ann is so careful that she always goes over her exercises to ______ there are no mistakes.
—_____will your sister be back ? —In about two hours.
—Please don’t touch that fish.It smells _______. —OK,I won’t.
—People now can know what is happening in the world quickly. —You’re right.With the help of computers,news can ___every corner of the world.
—Can I ______your dictionary? —Sorry,I’m using it.