At times ,worrying is a normal, ________response to a difficult event or situation—a loved one being injured in an accident , for example.
Don’t let yourself ______ into buying things you don’t really want.
—Is this the magazine ______ she often writes articles? —Yes, it is.
“This is ______ most useful reference book, ” Mr. Lee told us in ______ class.
20.If you are unable to attend the interview, for __________reason, you should inform us immediately.
19. You should write it in a style which is__________to your subject.