44. _____ the _____ of modern industry, the pollution is becoming more and more serious.
| A．With; developing | B．Under; development |
| C．With; development | D．Under; developing |
16．He looked around and caught a man _______ his hand into the passenger's pocket．
| A．put | B．to be putting | C．to put | D．putting |
15．– How cold it is! I wonder how grass survive under such heavy snow．
--Don’t worry．There is a lot of air in loose snow which _______．
| A．keeps out the cold | B．keeps the cold away |
| C．keep off the cold | D．keep the cold up |
14．As we all know, it takes ten years to grow trees but a hundred to rear people, which means it will be ________ one becomes a useful person．
| A．before long | B．long after | C．after long | D．long before |
13．Busy _______ she is, Rita ______ two hours every Sunday afternoon to spend with her son．
| A．though, sets out | B．as, sets aside |
| C．as, sets down | D．though, sets off |
12．One of the best ways for people to keep fit is to ________ healthy eating habits．
| A．grow | B．develop | C．increase | D．raise |