When the teacher came into the classroom, the students ____ in groups.
A．work B．have worked C．were working D．are working
In 2000, we ____ to the Great Wall and had a good time there.
A．go B．went C．will go D．have gone
Frank asked his father ____ a new bike for him and his father said OK.
A．buy B．to buy C．buying D．bought
—Must I go there right now, mum?
—No, you ____. You can go there tomorrow.
A．shouldn’t B．can’t C．mustn’t D．needn’t
— Do you like this shirt?
— Yes, ____ I don’t like the color.
A．but B．and C．or D．so
— ____ is your mother?
— She is in the kitchen.
A．Where B．What C．When D．How
