A new ________ bus service to Tianjin Airport started to operate two months ago.

There was a __________look on her face because a________ problem _________the little girl.

 The work was difficult, but Tom’s          expression showed that he would finish it in time.

—Which team is _______ to win the game?—I don’t know, but I’ve found _______ for ours to win.

     students are required to take the boat race.