[ Grammar ]
They’ve climbed a mountain, but they’ve _____ climbed a volcano.
A. ever
B. They’ve
C. never
D. swum
Select your answer:

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Preposition › ViewI am thinking ____ buying a new laptop because this one is too old.
A. with
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Vocabulary and Grammar › View
You _______________ use a mobile phone during class. It’s not allowed.
A. must
B. mustn´t
C. can
D. could
