---Tom’s been sent to the USA for further study. What about his twin sister?--- _____.How lucky they are!
To begin with, we learn how to______ our body when skating.
My sister, as well as her classmates who_______ late for class , ________ criticized by their head teacher.
—Who____ it be that is knocking at the door? —It ____ be Father, but I’m not sure.
My uncle’s house in the downtown area is much smaller than ours, but it is ______________ expensive.
Having said goodbye to their friends, they _______ for home. A. set about B. set up C set down D. set off