It is not so much the possible trouble caused by helping others _______ people’s unwillingness to show their sympathy _________ accounts for the present situation.
. Why didn’t you come? Haven’t you __________?
This dictionary is _____ to my reading, but that one is __________.
. We can hope ___ the best but we must prepare ____ the worst at the same time.
.Professor White has received a letter ___ to give a lecture in Peking University.
.The ____ in these villages has to get its water from well-spring.