[ Grammar : can, could and be able to ]
Yesterday I lost my keys and I looked for them everywhere, but I _____ find them.
A. couldn’t
B. can’t
C. be able to

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Grammar › ViewEach girl in the class __________ up and answer the question.
A. stand
B. stands
C. standing
D. stood
Modal Verbs › View
Which modal verb is used to express permission or possibility?
A. may
B. must
C. can
D. should
