Hard work and lack of sleep have _____ her beauty and youth in recent years.
| A．worn out | B．tried out | C．made out | D．sent out |
I was about to leave the office ______ an unexpected visitor came.
| A．while | B．as | C．when | D．before |
--- It took me two hours or so to walk here.
--- But you ______ here in Billy’s car.
| A．could have come | B．must have come |
| C．must come | D．could come |
Jack climbed ______ to the top of the mountain though he is only a boy of ten.
| A．in a way | B．in the way | C．by the way | D．all the way |
I don’t think he can pay off all the debt when he gets paid, ______?
| A．do I | B．don’t I | C．can he | D．can’t he |
Last night, they succeeded ______ the fire ______.
| A．to prevent; to break out | B．in preventing; breaking out; |
| C．to stop; breaking up; | D．in stopping; to break up |