[ Present Perfect Tense ]
Evans, Thomas and Roger ………………. to Korea many times.
A. have been
B. been
C. has been
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A. impending
B. underlying
C. counterfeit
D. insufficient
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He graduated (in/on/at) 2022.
A. in
B. on
C. at
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A. She musts study for the exam.
B. She must studying for the exam.
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D. She must to study for the exam.
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If I see _____ dog, I will run away
A. a
B. an
C. the