— My dog is really fat. — You______ have given it so much food.
| A．wouldn’t | B．couldn’t | C．shouldn’t | D．mustn’t |
We have been looking at houses, but haven’t found _____ we like yet.
| A．one | B．ones | C．them | D．it |
When I was younger, I’d often go for _____ drive with some friends, purely for _____ enjoyment of it.
| A．a; an | B．a; the | C．the; / | D．/; the |
--- Is Tom still smoking?
--- No. By next Saturday he _____ for a whole month without smoking a single cigarette.
| A．will go | B．will have gone |
| C．goes | D．has been going |
In dealing with public relations, we should make every effort to prevent the _____ in personality.
| A．contact | B．contrast | C．conflict | D．connection |
I know one of the things _____I was unsure about was _____ hard it would be to climb this mountain.
| A．that; how | B．what; how | C．which; what | D．/; what |