[ Grammar ]
Karen walked into the classroom ____ her teacher was starting the lesson.
A. as long as
B. until
C. by the time
D. just as
Select your answer:

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Grammar › ViewLook! It ___ outside. Take an umbrella!
A. rains
B. raining
C. rained
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Modal Verbs › View
Students _________ use their phones during exams.
A. must not
B. must
