Topics: 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
Select your answer:

Random Topics:
Demonstrative PronounHelpful Phrases Adjectives or AdverbsFunctional Sentence TypesRelative Clauses PronounsTenses and Time MarkersFragment, Comma Splice and Run -on SentencePhrasal verbs and Prepositional PhrasesHave to/Has toMust / must notOther quiz:
Comparative & Superlative Adverbs › ViewI’ll go and buy the train tickets. I live _________________ to the station. (+ near)
A. nearer
B. nearest
C. further
D. furthest
Grammar › View
One combination is not possible: Wind _______.
A. power
B. reactor
C. energy
D. turbine
