[ Grammar ]
Everyone should act ______in order to protect our environment.
A. responsible
B. responsibility
C. responsibly
D. responsibilities

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Grammar › ViewThe judge banged the gavel, and a hush fell instantly over the courtroom.
A. fragment
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C. compound
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Tenses › View
They … building the new wind farm yet.
A. haven’t finished
B. didn’t finished
C. have finished
D. finished