—I wonder what makes you a successful manager.
—I ________ as a waiter for five years，which contributes a lot to my today’s work.
A．serve B．have served C．had served D．served
There are solid reasons for China to claim ownership of the Diaoyu Islands, which lie about 200 miles the eastern coast of our country.
A. to B. on C. off D. of
My visit to your school is really an unforgettable experience, I will always treasure.
A. that B. one C. it D. what
—Did you look up the time of the high-speed trains to Shanghai?
—Yes, the early train is to leave at 5:30 a.m.
A. likely B. possible C. due D. about
Doctors strongly recommended that my father more exercise regularly instead of sitting still before a computer all day long.
A. takes B. take C. took D. had taken
The more one is _______ the English-speaking environment, the better he or she will learn the language.
A. exposed to B. filled in C. caught on D. kept up
