---Have you heard of Earth Day? --- Yes, We have only one Earth. We have no choice but ________ it.
——Is that boy ____ glasses your friend? ——Yes. He’s Bob. He likes to ______the funny glasses.
The park is _____here. You have to take a bus.
——How many tigers are there in the zoo? ——There aren’t ______.
——______is the weather like in Beijing now? ——It’s_____. We are making a snowman.
——Where are you, Linda? ——I’m ____a vacation in Beijing.