[ Grammar ]
You _____ use your mobile phone when you’re in a ‘quiet zone’.
A. haven’t to
B. mustn’t
C. don’t have to
Select your answer:
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Grammar › ViewThis house ____ by my grandfather in 1943.
A. is built
B. was built
C. was building
Subject Verb Agreement › View
Several of the students ____ going on the field trip to the zoo.
A. is
B. are