It is really _______ unusual experience, and I’ll never forget _______.
—What are you reading about?—It’s about the one-child policy. It says that the policy has____controlling the population in China.
—It seems _____ you like to work with children. —Yes, they are so lovely.
His close friend _____ for two years.
—Have you ever _____ Mudanjiang to see the Jingbo Lake? —Yes, I have.
.—_____ you _____ your homework yet?—Yes, I _____ it ten minutes ago.