It suddenly struck me that almost everyone in the restaurant was smoking. It wasn’t long     1   the whole room was filled with smoke. I asked with a (n)    2    for permission to open a window to let in fresh air.

   Nowadays air pollution is something that we hardly question any more. However, I still can’t walk down in any of the big cities without    3   that people are suffering from the air pollution. A friend of mine takes flying lessons each morning and it really leaves him  4   when he climbs above the smog layer(烟雾层)and looks down into it, thinking, “I’m breathing that!”  This kind of pollution    5    the bad management of resources.

1．A．ago                       B．after               C．before                 D．since

2．A．wish               B．apology               C．decision              D．suggestion

3．A．supporting             B．informing            C．concentrating       D．thinking

4．A．breathless              B．careless               C．foolish                D．awesome

5．A．results in         B． results from   C．causes by        D．causes from