London's road traffic map is like a cobweb(蜘蛛网) of small streets, offering drivers more _______ when one road is blocked.
| A．barriers | B．characters | C．similarities | D．alternatives |
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 |
—What does the sign over there read?―“No person ______ smoke or carry a lighted cigarette，cigar or pipe in this area．”
| A．will | B．may | C．shall | D．must |
— I heard they went skating in the mountains last winter.— It _____ true because there was little snow there.
| A．may not be | B．won’t be | C．couldn’t | D．mustn’t be |