The boy found _____ easy to fly kites.A. that B. it C. this
----What do you think of the book? ----I don’t think it’s ______ useful book.
---How about going to the park together? ---________
—Excuse me, ____ is it from our school to Huanglong Stadium? —About ____ drive.
––David has made much progress in Chinese this year. ––____. He has reached a level which is quite good.
He found ____ very difficult _____ the problem.