It is your own fault you are so tired . You oughtn’t to have stayed up so late .
| A．when | B．how | C．where | D．why |
We won't know whether it will be successful. We won't know whether there will be good _____.
| A．ends | B．results | C．effects | D．causes |
It has always been the _____ of our firm to encourage workers to take part in social activities.
| A．plan | B．campaign | C．procedure | D．policy |
The most important _____ of his speech was that we should all work whole-heartedly for the people.
| A．element | B．spot | C．sense | D．point |
When I worked as the general manager of the firm, I sometimes had _____ to visit London on business.
| A．opportunity | B．possibility | C．occasion | D．chance |
As civilization______, more and more people have realized the importance of preserving rare animals from extinction.
| A．stretches | B．spreads | C．extends | D．expands |