The Long River is one of ______in China.
There is no living thing on __________moon.A. the B. a C. 不填
— You have never seen the dinosaur eggs, have you?—________. How I wish to visit the Dinosaur World.
—Listen! Is that Millie singing?—No. It _____ be Millie. She has gone to Beijing.
— I don’t know ________ to deal with this problem.— Why not ask your teacher for help.
-- Thanks for offering me_________ useful advice!--__________.