35．Beijing was attacked by such a terrible sandstorm ______ few citizens had ever experienced before．

　　　　 A．what 　　　　　　　　　　　 B．as 　　　　　　　　　　　　　　 C．that　 　　　　　　　　　　　 D．which

34．There ______ be any difficulty passing the final exam since you've practised a lot in your study．

　　　　 A．mustn't　 　　　　　　　 B．shan't 　　　　　　　　　　 C．shouldn't 　　　　　　　 D．needn't

33．Having no access to the outside world, the villagers living in remote mountains ______ with various life of the modern world．

　　　　 A．get in touch　 　　　　 B．are in touch　　　　　　 C．keep in touch　 　　 D．are out of touch

32．The doctor always turned up ______ he was most needed．No wonder he was called "doctor sent by God"．

　　　　 A．the place where　　 　　　　　　　　　　　　　　　　　　　　　 B．in the place

　　　　 C．in which　　　　　　　　　 　　　　　　　　　　　　　　　　　　　　　 D．where

31．As many as 150 miners died in the accident．If only the mine-owners ______ enough attention to the safety measures!

　　　　 A．paid　　　　　　　　　　　　　 B．should pay 　　　　　　 C．would pay 　　　　　　 D．had paid

30．We must take measures to protect endangered wildlife ______ it is too late．

　　　　 A．as long as 　　　　　　　 B．when　 　　　　　　　　　　 C．before　 　　　　　　　　　 D．until

29．The students were just about to ______ the question when one of them found the answer．

　　　　 A．look for　 　　　　　　　　 B．come out　 　　　　　　 C．take to　　　　　　　　　　 D．give up