Work hard, ________ you’ll fail in the English exam this time.
| A．and | B．but | C．so | D．or |
— Will you stay for lunch?
— Sorry, I ______. My brother is coming to see me.
| A．needn’t | B．can’t | C．shouldn’t | D．mustn’ t |
I phoned you at six yesterday evening, ______ nobody answered.
| A．because | B．or | C．but | D．so |
— ________ did you last see him?
— Two weeks ago.
| A．How | B．Where | C．What | D．When |
There ______ little water in the river.
| A．be | B．am | C．is | D．are |
It’s very nice to visit New York ______ autumn.
| A．in | B．on | C．at | D．of |