Ladies and gentlemen, please remain in your seats.The plane________.
A. takes off B. is taking off C. has taken off D. took off
A ship is safe if it stays in a harbour. But this is not ___________ it is built.
A.what B.how C.why D.where
—Some say drinking coffee can cause cancer.
—Well, coffee drinking hasn’t been shown to ___________ your risk of cancer.
A. invite B. introduce C. imagine D. increase
According to Forbes, Amazon’s CEO, Jeff Bezos is now the _______ person in the world.
A.wealthiest B.wealthier C.wealthy D.most wealth
—Are you going to take part in the writing competition?
—Why not? I have ___________ to lose, right?
A.nothing B.something C.anything D.everything
—We have some exchange students at school. I heard _____ singing a Chinese folk song this morning.
—Really? It seems they are interested in Chinese culture.
A.they B.them C.themselves D.their
