[ Grammar ]
Keri was angry. She …………………. for Sarah for two hours.
A. waited
B. had been waiting
C. had waited
D. was waiting

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Grammar › ViewA number of humanitarians working here ______ volunteers.
A. is
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Tag Question › View
Your brother teaches English, _________?
A. does he
B. doesn’t he
C. do he
D. isn’t he