【强化训练】
　　1. If city noises ____ from increasing，people ____ shout to be heard even at dinner．
　　A．are not kept；will have to
　　B．are not kept；have
　　C．do not keep；will have to
　　D．do not keep；have to
　　2. The fifth generation computers, with artificial intelligence, are ____ and perfected now.
　　A. developed　B. have developed
　　C. are being developed　D. will have been developed
　　3. -- ____ the sports meet might be put off．
　     -- Yes，it all depends on the weather．
　　A．I've been told    B．I've told
　　C．I'm told    D．I told
　　4. I need one more stamp before my collection ___.
　　A. has completed   B. completes
　　C. has been completed   D. is completed
　　5. Rainforests ___ and burned at such a speed that they will disappear from the earth in the near future.
　　A. cut   B. are cut
　　C. are being cut   D. had been cut