Mr Chen __________ his mobile phone to the shop because it can’t work at all.
----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.