dn’t care about what other people thought aboutme.— Well, you ________.

Having walked in the desert for several days，we finally reached what was called oasis，________.

The scientist decided to devote his life to ____ pollution from ____ again.

I’ll return the book to the library as soon as I________it .

We are still at the airport．If it weren’t for the delayed flight, we _______ the concert right now．