Nick and Pat often ______ e-mails ______ each other.
—_____do they go to movies?— Once a month.
—I think______is not easy to draw this picture.—I think so.
—What’s the weather like in Qinghai in winter?—There is ________snow and it is ______cold.
— Excuse me. Where is the stair?— Ok. Go straight ____that door under the EXIT sign.
---Are there any animals in the zoo?---____________.