If it ________ for the heavy rain then, we would have arrived here ahead of time.
| A．shouldn’t be | B．weren’t | C．had not been | D．be not |
— The woman biologist stayed in Africa studying wild animals for 13 years before she returned. — Oh, dear! She ______ a lot of difficulties!
| A．may go through | B．might go through |
C．ought to have gone through | D．must have gone through |
To be on the safe side, we should fill up the tank now, because we ______ run out of gas on the way.
| A．can | B．would | C．might | D．should |
There used to be a small school,___________?
| A．was there | B．wasn’t it | C．usedn’t there | D．usedn’t it |
The two strangers talked as if they ____ friends for years.A should be B would be C have been D had been
—Mum, I’ve been studying English since 8 o’clock. ____ I go out and play with Tom for a while?—No, I’m afraid not. Besides, it’s raining outside now.
| A．Can’t | B．Wouldn’t | C．May not | D．Won’t |