–Who’s your science teacher this term?–Mr. Wang. _______ is a good teacher.

I love music, and _____ father often takes me to the concert. 

David talked with a friend of ________ on the Internet for a long time yesterday.

 --- Which subject do you like better, Chinese or Maths?---       . I prefer English.

— __________ is the cost of the trip?— Ten dollars per person.