_______useful the information he gave us is !
| A．What a | B．How | C．What | D．How an |
Before you start this task, you ________ realize its importance of doing it.
| A．may | B．can |
| C．ought to | D．would |
To save water, the parents told their children ________ their teeth under a running tap.
| A．to brush | B．not brushing |
| C．not to brush | D．brushing |
Mr. Lee spent the final time of his life in writing after finding out that he ________ soon.
| A．would die | B．will die |
| C．died | D．has died |
Father was very angry because his favorite glass ________ by his pet dog.
| A．broke | B．has broken |
| C．was broken | D．has been broken |
.The school meeting ________ once every two weeks in the concert hall.
| A．is held | B．was held |
| C．will be held | D．has been held |