The teacher asked us to get on with the next exercise and he would be back in a while.<br>A. finish doing B. start doing C. continue doing D . stop doing <br>17. Those students who fail the National High School exams may want to retake them the following year. <br>A. pass B. fall C. sit D. take <br>18. Thanks to lifelong learning, people's level of awareness has improved significantly.<br>A. has increased B. has declined C. has gone up D. has bettered <br>19. The teacher is going to a conference next week, so our presentation will be put off.<br>A. delayed B. deferred C. carried out D. cancelled <br>20. A new school has just been set up for the kids in the area. <br>A. started B. established C. built D. demolished <br>21. Unnecessary components should be removed from the current program to reduce the workload for school students. <br>A. added B. taken away C. taken off D. abolished<br>22. The school picnic has been cancelled because of bad weather.<br>A. called off B. continued C. destroyed D. broken off <br>23. If children are inactive most of the time, it is very easy for them to gain weight. <br>A. put up B. loose C. lose D. put on
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