It __________Mike and Mary who helped the old man several days ago.
举一反三
- It _____ Mike and Mary who helped the old man several days ago. A: was B: are
- It _____ Mike and Mary who helped the old man several days ago. A: was B: are
- It _____ Mike and Mary who helped the old man several days ago.( ) A: are B: were C: was D: had been
- It ____ John and Billy who helped the old man several days ago. A: were B: is C: was D: are
- It_____Mary and Mike who helped the old man yesterday.