Professor Smith, along with his assistants, ______ on the project day and night to meet the deadline.
| A．work | B．working | C．is working | D．are working |
— Did you happen to hear the recent news?
—Yes, Alice ____ the entrance examination, which I find hard to believe．
| A．fails | B．had failed | C．failed | D．will fail |
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 |