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