21．In the early morning all of us stood at the top of the mountain to ， watching ．burning sun rising east of the city
A．the；a B．／；a C．the；the D．the．；／
22．Before “Wolf Father” promoted the book ”That’s why they go to Peking University”，no one would have imagined starting such a heated discussion on parentlng．
A．they B．theirs C．he D．his
