★ Passive Modals
People —- (not explain) some UFO sightings easily. No one is able to explain them easily.
A. cannot be explained
B. cannot explain
C. cannot been explained
D. cannot explained
Preview next quiz:
A child —- (not give) everything he or she wants.
A. shouldn’t be given
B. should been given
C. should give
D. shouldn’t give
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