[ Modal Verbs ]
I _____ my wallet in the restaurant. I paid for the taxi home afterwards.
A. must have left
B. could have left
C. can’t have left
Select your answer:

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Vocabulary › ViewA person that is _______ might recyle and reuse plastic bottles
A. a resourceful
B. appreciated
C. a tormentor
Comparisons › View
Ozone depletion has been_________at the poles, especially over Antarctica, where a seasonal ozone layer “hole” appears.
A. as much severe as
B. so many severe as
C. far more severe than
D. by far the most severe
