— How could they keep us waiting for so long? — They got on the bus half an hour ago and they ________ be here in ten minutes, I think.
The teacher told us that light _______ faster than sound.
It was not until she got home ____ Jennifer realized she had lost her keys.
Jane said to Mary, “What are you going to do tomorrow?” Jane asked Mary ___________.
The money collected should be made good use ________ the people in Taiwan who suffered a lot in the earthquake.
Students are required to _______ down what the teachers teach in class. Which of the following is wrong?