Mr. Wu came into the classroom , a book in his hand.
----Martin Murray used to be afraid of ______ alone. ----But now he realizes that his mother is always there for him.
Our hometown Wenzhou _________ a lot in the last few years.
----May I go swimming this afternoon? ----I'm afraid not _______ you have finished your homework.
----_____ do you learn English so well? ----I learn ______ using it.
----Do you know ________ man who is standing under the tree? ----He is my new English teacher, Mr Hu.