[ Grammar ]
The teacher had the students ______ up the classroom.
A. clean
B. cleaned
C. cleaning
D. to clean

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Grammar › ViewWe…….here since yesterday
a.has been
b.have been
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Alice is Canadian. _______________ parents live in Ottawa.
A. His
B. Us
C. Her
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Although it rains heavily outside, farmers still _____ hard on the farm.
A. will work
B. are working
C. work
D. worked
