[ Modal Verbs and Vocabulary ]
A “theory” is…
A. a type of animal
B. a possible explanation for something
C. a trick or joke
D. a financial document
Select your answer:
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Tenses › ViewHow long __ they __ (wait) for us?
A. do, wait
B. are, waiting
C. have, waited
D. have, been waiting
Grammar › View
it means to receive.
A. accept
B. except