I like snacks but I do not eat them______.
—Have you ever _____ Mudanjiang to see the Jingbo Lake?—Yes, I have.
My friend and I joined a program ______ Green China.
Bad luck! My watch is broken, ____ it doesn’t _____.
—Beijing has improve a lot these years.—_____ and_____.
_____ we have built “the Green Wall’, _____we still need to work hard to protect our environment.