21.What a pity! Amy’s pet dog is dead. If I ___ a veterinarian, I______ the clever dog.
A.am ; save B.was ; would save
C.were ; would save D. am ; will save
22.I prefer____ rather than _____.
A.to watch TV ; listening to radio B. watching TV ; listen to a radio
C. watching TV ; listening to a radio D. to watch TV ;. listen to radio
23.I come _____ my father _____ he is ill in hospital.
A. instead of; because of B. instead of; because
C. instead; because D. instead; because of