[ Modal Verbs ]
He _______ seen the warning sign; that’s why he kept going.
A. could have
B. should have
C. must have
D. might have
Select your answer:
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Perfect Modals › ViewWho broke the big vase in the back office?
It __ (be) Brian – he’s very clumsy.
_
A. should have been
B. ought to have been
C. might have been
Gerunds And Infinitives › View
Space photography permits large areas of the Earth’s surface …… at a glance.
A. having seen
B. to be seen
C. seeing
D. to see
E. to have seen