[ Grammar ]
They …………… (clean) the whole house.
A. are cleaning
B. cleaning
C. cleans
D. clean
Select your answer:

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Gerunds and Infinitives › ViewWe are happy ____ (see) you here.
A. seeing
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Grammar › View
The passengers _________wear their seat belts at all times.
A. could
B. must
C. can
D. may
