( ) (6) 你想介绍姐姐给别人认识,你会说:A. This is my sister. B. This is my friend.
—Let’s play basketball on Sunday. —__________.
To be a good swimmer, I must havelessons.
Let me __________ the teacher to help answer the question.
This is an __________ to the cinema.
一Let’s help our teacher carry the heavy bag. —__________.