第1个回答 2007-10-07
The air pollution is a bit serious and the litter is thrown about on the ground and in the water.
第2个回答 2007-10-07
The air pollution is very serious and the litter is thrown everywhere.
第3个回答 2007-10-07
The air pollution is somewhat severe. Rubbish can be seen everywhere, in the water and on the ground.本回答被提问者采纳