[ Grammar ]
A：What did you do an hour ago? B：I ＿＿＿ the Internet in my room.
A. surfs
B. surf
C. surfed
D. am surfing
Select your answer:
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Tenses › ViewThe concert ____________ at 8:00 PM tonight.
A. is starting
B. starts
C. started
D. has started
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You….ask your teacher if you don`t understand.
A. must
B. mustn`t