A. Who B. How C. What D. Which
A. How soon B. How often C. How long D. How far
A. How often B. How soon C. How long D. How far
A. Wang Gang B. wang gang C. Wang gang D. wang Gang
A. John B. Smith C. John Smith D. Smith John
A. introduce B. introduced C. to introduce D. introducing
A. Welcome. B. Congratulations! Certainly. D. Exactly.
A. on foot B. on feet C. take a bus D. by a bike
A. is B. are C. were D. was