A. mightitbe B. couldithavebeen C. coulditbe D. mustithavebeen
A. will B. would C. shall D. can
A. mustuse B. uses C. musthavebeenusing D. mustbeusing
A. mustgo B. go C. willgo D. wouldgo
A. breaks B. hasbroken C. werebroken D. hadbeenbroken
A. bepunished B. wouldpunish C. wouldbepunished D. shouldpunish
A. hadknown B. wou欤?know C. shouldknow D. knew
A. was B. be C. is D. were
A. might B. must C. can D. should