I have two sisters. One is in Beijing, ______is in Lanzhou.
—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.
—Shall we raise some money for children of Yushu, Qinghai Province? —___.