29. In this factory, it' s hard to tell cadres　　　　 workers.

A. from B. to　　　 C. about

28. We waited　　　　 for the bus.

A. for long time　　　　 B. a long time C. some long time

27. He is 　　thin.

A. fairly　　　 B. rather　 C. little

26. My father　　　　 me to become a doctor.

A. thinks　　　 B. says　　 C. hopes

25. We　 　　　a spare-time study group last week.

A. set up　　　 B. put up C. have established

24. We must　　 the importance of the four modernizations.

A. learn by heart B. keep in mind　　 C. know by heart

23. I need a day or two　　 .

A. to think it over　　　 B. to think over it　 C. of thinking

22. When did you　　　　 my letter?

A. receive　　 B. accept C. got

21. I' ve heard him　　 about you often.

A. spoke　　　 B. speaks C. speak

20. The poor peasants all had a　　 life before liberation.

A. suffered　 B. cruel　 C. bitter