[ 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

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Grammar › ViewThe bears are hungry. ________ are hunting for food.
A. We
B. It
C. They
D. He
Grammar › View
We …………………..………….. Joe at the office at this time tomorrow. (meet)
A. are meeting
B. were meeting
C. will be meeting
Grammar › ViewThe student ____ homework is due tomorrow needs to complete it tonight.
A. whose
B. which
C. who
Grammar › View
Choose the correct spelling below.
A. discover
B. discaver
C. descover
