______ in his studies, he didn’t know that all the others had left.

Mr. Smith has decided to his bad habit of smoking.—That’s good news. I hope he can do it.

How long may I _________ the book? —For two weeks.

Each year __________ fishes are killed by the polluted water and many people are made sick by the polluted air .—-So we should do something to stop it .

I forgot to bring my pen, would you please lend ________ to me?