. The Smiths ______ their breakfast when the morning post came.
| A．had | B．has been having | C．are having | D．were having |
It is no use _____ such mistakes. You should learn a lesson from them.
| A．regret to make | B．regretting to make |
| C．to regret making | D．regretting making |
Peasants earn their living by selling agriculture ____ in China.
| A．food | B．produce | C．production | D．cost |
It was a matter of _____ would take the position.
| A．who | B．whoever | C．whom | D．whomever |
When the teacher praised him for working out the math problem, Jack looked __________ about at his classmates.
| A．proud | B．proudly | C．pride | D．pridely |
You must come with us to the police __________ Our head is waiting for you.
| A．headquarter | B．headline | C．headmaster | D．headache |