[ Grammar ]
At 2 a.m. yesterday, the cat ___ at the moon.
A. are staring
B. were staring
C. is staring
D. was staring
Select your answer:

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Present Continuous, Present Perfect and Used toParticiple AdjectivesShould and Shouldn'tTenses and AdjectivesGrammar and Sentence CorrectionFirst Conditional SentenceSimple and Continuous TensesQuantifiersAdverbs and Adverbial PhrasesPresent Simple Positive and NegativeOther quiz:
Grammar › ViewThe scientist’s findings were considered _____ in the field of biotechnology, prompting further research into the subject.
A. derivative
B. ground-breaking
C. anachronistic
D. peripheral
Vocabulary › View
The philosopher spent his life studying questions of existence, identity, and reality—areas that fall under _____.
A. sedimentation
B. metaphysics
C. biosphere
D. advent
