[ Grammar ]
use past perfect simple or past perfect continuous: I ____ (be) at home all day. I had to get out and go for a walk.
A. have been
B. has been
C. been

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A. run on sentence
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My parents respect my career choice, so I ______ follow in their footsteps.
A. mustn’t
B. don‘t have to
C. should
D. shouldn’t