—Perhaps John's not in.
—______.Look，the light's on.
| A．Yes，he can be at home |
| B．No，he couldn't go out |
| C．Yes，he must be at home |
| D．No，he needn't go out |
I had planned for the housecloser to a river, but I was told there was a danger of flooding.
| A．built | B．to be built | C．being built | D．be built |
—Must I turn off the gas after cooking?
—Of course, you can never be ____careful with that．
| A．enough | B．very | C．so | D．Too |
My mother is always warning me when I go out, “Don’t get off the bus ____it is stopping.”
| A．until | B．before | C．while | D．After |
A man hurried in and asked, “Is there a hospital around I can get some medicine for my wounded hand?”
| A．that | B．which | C．what | D．where |
The car number 57777 is a special number, ____, I think, passers-by can easily remember.
| A．one | B．what | C．that | D．it |