—Do you often write __________ your parents?
—No. I often talk with them __________ the phone.
A.to; in B.for; on C.to; on D.for; in
—Look, John's sleeping at work!
—Oh, he __________ get up early this morning.
A.shall B.might C.need D.should
Lu Xun is one of __________ of modern China.
A.the greatest writer B.the greatest writers C.greater writers D.greatest writer
The little girl was too weak. She could __________ walk.
A.hard B.certainly C.ever D.hardly
We have to drive very carefully to __________ accidents.
A.avoid B.refuse C.encourage D.provide
—There are only about 1,600 pandas in the wild.
—Oh, dear! They are in a very difficult __________.
A.time B.world C.population D.situation