[ Grammar ]
I can tell _____ having fun.
A. they’re
B. there
C. their

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Grammar › ViewObviously, objectives occasionally ………….. be modified or changed.
A. shouldn’t
B. have to
C. must to
D. ought
Modal Verbs › View
I ___ to tidy my room more often, but I never seem to find the time.
A. ought
B. should
C. must