. You should ______ what your parents expect of you.
— What do you suppose ______ her look so upset? —______ by her boyfriend again.
This kind of glasses made by experienced workers _______ comfortably.
Your window wants ________;you’d better have it ______ this week.
Between the two parts of the concert is an interval(休息时间), ______ the audience can buy ice-cream.
It is never clear _____ the man hadn’t reported the accident sooner.