Some students are so ______ that they often make mistakes in their homework.
—Mary can’t help ___the house. Why? —Because she is busy ____a hotel reservation.
It is about _______by bus from here to Harbin.
It’s impossible for us ____ there on foot in two hours.
—Will you go to Hangzhou by _____ car? —No, I'll take _____ train.
—What did Miss Wang say just now?—She told us .A. that Peter was ill todayB. if there is a meeting todayC. when can we have a party today