The play had been on for 10 minutes but I was still unable to find a seat __________.
| A．to sit |
| B．to sit on |
| C．sit |
| D．sit on |
19. If you are not sure _______ your strengths and weaknesses ______, you may ______ a professional expert so that you can develop yourself to the full.
| A．what; lie; talk with | B．where; lie; consult |
| C．which; lay; refer to | D．where; lay; go to |
18. The spy caught ______ the military base was sentenced to 20 years in prison and was limited ______ no relative visiting.
| A．to spy on; to | B．spying on; to | C．to spy on; with | D．spying on; with |
17. Children brought up in cities are often full of _______ about how beans, peas, cucumbers, eggplants, mushrooms carrots, which they eat as daily vegetables, _______.
| A．ideas; are grown | B．curiosity; are grown | C．fantasies; grow | D．imagination; plant |
16. There was so much noise produced by the machine outside that the professor had to ______ his voice so that it would not ________.
| A．rise; be drowned | B．lift; drown | C．increase; drown | D．raise; be drowned |
15. A group of children ______ around the old man, listening to him telling the story and they ______ when it came to something really exciting. 
| A．were gathered; held their breaths | B．gathered; held their breath |
| C．gathered; held their breaths | D．were gathered; held their breath |