-Do you know _______ World Water Day is?-On March 22nd.
Look! ______ pretty the dragon boats are!
The librarian(图书管理员) warned me _____ the books in two weeks.
One night, Hou Yi found that the moon was ____ bright and round _____ he could see his wife there.
I was afraid ______ mistakes.
_______ English programs is a good way to learn English.