Tony is of the three boys， but he is the tallest．（ ）
A．youngB．younger
C．youngestD．the youngest
I think I'll take a bus to the meeting．
The bus？If you_______，you will be late．（ ）
A．doB．have doneC．will do
_______ will you fly to Beijing？
In two days．（ ）
A．How longB．How oftenC．How soon
Miss Smith，an American lady，has taught _______ English for three years．（ ）
A．weB．usC．our
Let me know ．（ ）
A．when you are readyB．when are you ready
C．when do you ready
I like music can touch the hearts of people．（ ）
A．whoB．thatC．what