---Have you heard of Earth Day? --- Yes, We have only one Earth. We have no choice but ________ it.
Please remember the window when you leave the classroom.
If it tomorrow, we to climb mountains.
—What do you think of the talk show? —. I watch it every week.
The weather in Guiyang in summer is than in Liu Panshui. They’re different.
Last week, our class did on our school trip.