The farmers were so sad ____ they lost their farms.
Just before the Chinese class, I suddenly realized that I forgot _______ my Chinese text book.
We need to come up with a/an________and make a decision at once.
--- Do you know the boy________ is sitting next to Peter?--- Yes. He is Peter’s friend. They are celebrating his ________ birthday.
—Why do you like Mary? —Because she is honest girl. A.a B.an C. the
In a position like this, one can ________ stand up _______ lie down . So it is very uncomfortable.