______of the earth is covered with water.A. three fourthB.threes fourthsC.three fourths
—Can I wear any clothes I like to school?—No, you can’t. You ___ wear a uniform.
—Would you like to go and see avatar with me tonight?—Thank you very much, but I ___ it already.
He wanted to know ___ the English party.
We won’t start the meeting ___ our teacher arrives.
Liu Xiang ___ by his coach to train regularly.