If you really have to leave during the meeting, you’d better leave ____ the back door.
I’m stuck on this problem;you may ask knows better than I.
—What’s that building?— the medical equipment is stored.
I know he said so at the meeting is true.
—Do you think that man will come to your help?—I really don’t know a person like him can help me with.
I must think of a proper gift for my mother, won’t be expensive but will make her happy.