The river has been polluted by the factory nearby since five
Mr.Smith has been here since the factory opened为
three——(five)of the water there has been polluted because of
英语翻译The region has been seriously polluted by harmed smog,wh
The river ________ (become) dirty since the paper factory wa
he has been away from the factory .a a week ago b since a we
my father has been working in the factory (since 1990) (对括起来
tom has been in the factory --- he left school.a.since b.as
The project to clear up the polluted river()by the end of ne
It has been five years since the hospital ()(build) 动词填空.
Mike has been in the cinema since five o'clock同义句
Mike has been in the cinema since five o'clock.改成一般过去时
从句变分词:the water was from the river which had been polluted b