I didn’t see her in the musical hall this evening. She have sung at the concert.
| A．mustn’t | B．shouldn’t | C．needn’t | D．couldn’t |
All possible means _______. However, nothing can _______ him dying of lung cancer.
| A．has tried; stop |
| B．have tried; keep |
| C．has been tried; prevent |
| D．have been tried; stop |
Do you think ________ life on Mars?
| A．it exists |
| B．there exists |
| C．it is existed |
| D．there is existed |
At the ________ news, there was a ________ expression on his face.
| A．puzzled; puzzling |
| B．puzzling; puzzle |
| C．puzzling; puzzled |
| D．puzzled; puzzle |
We were scared to death when the fire ________. Fortunately, it was put out before it caused much damage.
| A．broke out |
| B．came out |
| C．gave out |
| D．turned out |
He has ________ letters to answer and has to work from morning to night.
| A．much |
| B．a great deal of |
| C．masses of |
| D．the number of |