—The music is so beautiful! Is this by Mozart or Strauss?
— ________. Let's ask Betty.
A.That's right. B.I'm not sure. C.Yes, it is. D.I don't think so.
You ________ stay in a hotel or as a guest with а family, but that depends on your personal choice.
A.may B.should C.must D.need
China ________ a lot to protect pandas since 1980.
A.does B.did C.has done D.is doing
Dr. Zhong Nanshan still works hard ________ he is 84 years old.
A.though B.if C.so D.because
________ energy, many factories make products with recycled materials.
A.Save B.To Save C.Saving D.Saved
Lao She ________ "people's artist" because he always told stories of common people's lives.
A.calls B.will call C.is called D.will be called
