[ Grammar ]
John is interested …………………..the history of Vietnam.
A. in
B. on
C. at
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Tenses › ViewA: What ____ of the new simplified tax law?
B: It’s more confusing than the old one.
A. are you thinking
B. do you think
C. have you thought
D. have you been thinking
Grammar › View
singular means:
A. one
B. two or more