[ Vocabulary ]
The professor has written many books and is an _________ on the process of language learning.
A. amateur
B. officer
C. opinionated
D. authority
Select your answer:
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Vocabulary › Viewto suggest or hint slyly
A. insinuate
B. vicious
C. trivial
D. interrogate
Grammar › View
………………………….. for lunch together.
A. Let’s go
B. Let’s goes