Knowledge and learning are important if we want to be successful, but they may also our thinking.（2011 .湖北）
| A．direct |
| B．limit |
| C．change |
| D．improve |
—James didn’t turn up last night,did he?
—No. He ________. We had changed our plan.
| A．shouldn’t have come |
| B．needn’t have come |
| C．didn’t need to come |
| D．needn’t come |
—Has Mary finished writing her article?
—No, it ________ before class was over.
| A．should be finished |
| B．should finish |
| C．should have finished |
| D．ought to have been finished |
You ought to tell him the truth,________?
| A．don’t you |
| B．oughtn’t you |
| C．will you |
| D．shall you |
The plant is dead. I ________ it more water.
| A．will give |
| B．would have given |
| C．must give |
| D．should have given |
I promised to get there before 5 o’clock, but now the rain is pouring down. They ________ for me impatiently.
| A．may wait |
| B．ought to wait |
| C．could wait |
| D．must be waiting |