—Could you help me with the math problem?
—________ Your must be barking up the wrong tree.
A．A pleasure. B．Hang on a minute.
C．What’s the point? D．Are you kidding?
________ operation was very successful indeed，which was ________ comfort to the concerned mother.
A．The；/ B．An；the
C．An；a D．The；a
Tom raised his hands to say something, but he remained silent in the end.
A. even if B. as if C. so that D. now that
For some time the expert __________ people of the health risks caused by passive smoking. He says he won't stop until all the smokers around him decide to quit smoking.
A. is warnedB. is warningC. has been warningD. has been warned
—_____ that he picked up French?
—It was in 2010_____ he traveled in France.
A. Was it when; that B. When was it; that
C. Was it when; when D. When was it; when
Have you ever stopped _____ how our lie _____ if the world ran out of ol?
A.to think, would change B. thinking, would change
C. to think, will change D. thinking, should change
