_____ for the free tickets, I would not have gone to the theatre.
| A．If it is not | B．Were it not | C．Had it not been | D．If they were not |
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 |
14. Day and night, the little boy is at his compute
r, playing computer games, as if ______ with them.
| A．to have great fun | B．having great fun | C．having a great fun | D．to have a great fun |