单项选择题
I find ______ hard for me to learn Japanese. A) that C) it B) this D) what
单项选择题 Once ______ water, fish can' t live.
单项选择题 The postman wishes that he ______ her the letter which made her so sad.
单项选择题 It is generally considered unwise to give a child ______ he or she wants.
