Coughing _____ also be used for social reasons, such as the coughing before giving a speech．
| A．may | B．should | C．must | D．need |
—Shall I take the luggage to your room?
—No, thanks. _______
| A．It’s up to you. | B．You’d better not. |
| C．I can manage. | D．That’s settled. |
The white building across the street, _____ roof has been seriously damaged in the hurricane, belongs to a hospital.
| A．where | B．why | C．which | D．whose |
The new storybook is written in _____ easy English _____ beginners can understand it.
_____ sweet and good, the birthday cake was soon eaten up by those children.
| A．To taste | B．Tasting | C．Tasted | D．Having tasted |
My brother has his own business — that’s also ______ I expect to do after I graduate from Harvard University.
| A．why | B．when | C．that | D．what |