In the past month, cruel snowstorms hit some European countries and America , great transportation problems in these countries.
A．causing B．caused C．to cause D．having caused
______he has made up his mind, no one can make him change it.
A. Although B. Unless C. Until D. Once
—I’m going to the United States.
—How long ______ you ______ in the United States?
A. are; stayed B. are; staying C. have; stayed D. did; stay
Tom always prefers _________on foot rather than _______ a bike.
A . walk; ride B. walk; riding C. to walk; ride D. riding; to ride
—You went to the US last month , didn’t you?
—Yes. That was the first time that I________ there.
A. went B. had gone C. had been D. have been
The engine of the bus was out of order and the bad weather ___ the worries of the passengers .
A. added up B. added to C. made of D. resulted from
