We will have no water to drink _________ we don’t protect the earth.A. until B. if C. unless
—Do you have a(n)______? —No, I don’t. I am only 11 years old.
Here are some ______. Do you like ______?
Let her ________ the book there.
–Mike, your jacket is very (非常) beautiful (漂亮). ---___________.
The movie 《蓝精灵》is an _______ movie. Many people like it so much..