—How often do I need to feed the dog?
—It ________ food every day, or it will be hungry.
A．must give B．must be give
C．must be given D．must be gave
—It's difficult to get to the other side of the river.
—I think a bridge ________ over the river.
A．should be built B．should build
C．will build D．has built
Flowers_____ along the road last year.
A．plant B．planted
C．are planted D．were planted
.Pens are used for on paper.
A. write B. writing C. to write D. wrote
— Do you know in ancient China?
— I have no idea. But I know people once used tree leaves to make paper.
A. how paper was made B. how was paper made
C. what paper was made D. what was paper made
— Michael Jackson was called the king of pop, wasn’t he?
— Of course. He by people all over the world.
A. was looked up B. was looked up to
C. looked up D. looked up to
