—Why did Mr. Green take his 7th grade students to the river yesterday afternoon?
—________ the river.
A.Cleaned up | B.Cleaning up |
C.To clean up | D.Clean up |
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—Why did Mr. Green take his 7th grade students to the river yesterday afternoon?
—________ the river.
A.Cleaned up | B.Cleaning up |
C.To clean up | D.Clean up |