_____ the Internet brings much profit in, it can cause o lot of social problem

Lisa hasn’t been feeling well . You’d better go and see her.

She has________a lot of things, so she knows exactly how to deal with such a person. [ ]

The cars give off a great deal of waste gas in the street.—Yes, But I’m sure something will be done toair pollution.

It’s reported that a plane with five people _______ crashed into the mountain several days ago