Jack and Peter, together with Bob, ________ to the moon. A. has never been B. has never gone C. have never been
---To achieve a bright future, we should ___ study hard ___ keep in good health. ---I agree with you.
---I have great ___ in learning physics and I’m so worried. Could you help me? ---Sure, I’d be glad to.
After a long walk in the sun, they wanted to drink _____.
---___ sweet music! Do you like it? ---Mm, it ______ beautiful!
---____ will your father come back from Beijing? ---In two days.