—__________you a student?—No, I___________not.A.Are; is B.Is; am C.Are; am
April 22nd ____________ World Earth Day. A. areB. isC. was
Everybody should do something ____________ our planet. A. to saveB. saveC. saving
What ____________ we do to protect our environment?A. doB. shouldn'tC. can
We can save water and ____________. A. energyB. energysC. energies
We shouldn't ____________ litter on the ground. A. throwsB. throwC. threw