Which is ______ to learn, fishing or swimming?
| A．easy | B．easier | C．the easier | D．more easily |
They didn't go to bed_____ the work was finished.
| A．when | B．while | C．until | D．after |
一______ is your father?
— A bank clerk. He works in a bank near my home.
| A．Where | B．How | C．What | D．Which |
______ went hiking last weekend because of the bad weather.
| A．Someone | B．No one | C．Everyone | D．Nothing |
—Must I wait for you here?
—No, you ______.
| A．don't | B．can't | C．mustn’t | D．needn’t |
Mary, put on your coat, ______ you'll catch a cold.
| A．and | B．or | C．so | D．but |