一I want to borrow the book,but I don’t know how long it may .一For two weeks.
Don’t go out on the thin ice, ________ you’ll fall in the river.
We love to go to the country in spring because the flowers smell so _____.
—May I smoke here? —________, you ________. It can be dangerous.
Let the children go away. They’re making too much ________ here.
—May I borrow these books? —Certainly. You can borrow ________ of the two books, but you can’t borrow ________.