When I passed the classroom, I heard a girl ________ in it.
A．sing B．to sing C．sang D．singing
—Can I walk across the road now, mum?
—No, you ________.You have to wait until the light turns green.
A．couldn't B．shouldn't
C．mustn't D．needn't
—________ nice dress it is ! —Thank you!
A．What a B．What C．How D．How a
—I think ________ good to study with a group.
—I agree with you.Group work makes us study better.
A．that B．it C．its D．this
He suggested ________ shopping.
A．going B．went C．goes D．go
Have you decided when ________ for London ?
A．will you leave B．you will leave
C．are you going D．you are going
