[ Must or Mus not ]
We ______ use phones or tablets at school.
A. mustn’t
B. must
Select your answer:
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Past Tense and Perfect Tense › ViewJane and Kent playing volleyball ______ covered court.
A. In
B. At
C. On
D. Behind
Vocabulary & Grammar › View
It is ____________ knowledge that water boils at 100°C.
A. common
B. popular
C. regular
D. normal