_______ such heavy pollution already, it may now be too late to clean up the river.
| A．Having suffered | B．Suffering | C．To suffer | D．Suffered |
—He ought to have been warned of the danger.
—____, but he wouldn’t listen to me.
| A．yes, he ought to | B．So he was | C．So was he | D．So it was with him |
If you don’t know what this means, _____ the dictionary.
| A．look into | B．look up | C．look over | D．refer to |
We bought the house for its _____. It is very near the shop where I work.
| A．characteristic | B．value | C．convenience | D．construction |
Eating too much fat can ____ heart disease and cause high blood pressure.
| A．result from | B．contribute to | C．attend to | D．devote to |
_____ being too large, the trousers are too expensive.
| A．Except | B．Apart from | C．In addition | D．Beside |