The speaker _____ several other subjects in the course of his talk but mostly kept himself to the main topic.

　　A. held on    B. worked out    C. touched on    D. kept out of

 It has always been the _____ of our firm to encourage workers to take part in social activities.

　　A. plan    B. campaign    C. procedure    D. policy

_____ his knowledge of the mountainous country, John Smith was appointed as our guide.

　　A. In spite of      B. On account of 　　C. Regardless of    D. Instead of

 A completely new situation is likely to _____ when the school leaving age is raised to 16.

　　A. arouse    B. rise    C. arise    D. abide

–Is he coming?

       --I’m not sure. He may be late or, ________, he may not come at all.

       A. at present              B. at least              C. worse still           D. for a while

 There is no night-flight to the small town. The service was ________ at the end of the summer.

       A. turned over              B. turned off          C. taken out               D. taken off

. This dance is known _________ country music.

       A. performed by    B. performing with   C. to be performed to       D. being performed in

If you can’t come tomorrow, we’ll _________ have to hold the meeting next week.

       A. yet                 B. even                  C. rather                   D. just

. Be careful when you cross this very busy street. If not, you may _______ run over by a car.

       A. have              B. get                 C. become                D. turn

 –How long are you staying?

   --I don’t know. _______.

       A. That’s OK         B. Never mind                     C. It depends             D. It doesn’t matter