[ Passive Voice ]
The bag ………. behind.
A. must have been left
B. must have be left
C. must have left
D. must left
Select your answer:
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Grammar › View
The dog is ______ the house.
A. on
B. under
C. at
D. in
Modals › View
You ____ worry about him. He knows what he’s doing.
A. don’t need to
B. can’t
C. have to
D. should