He made up his mind to devote his life pollution happily.
| A．to prevent, to live | B．to prevent, from living |
| C．to preventing, to live | D．to preventing, from living |
We stop ___________ when our teacher comes in.
A. playingB. to playC. play
----____________ have you lived in Jiangsu?
---- Since five years ago.
A. How longB. How far C. How often
The girl is going to do ______________.
A. what does she want to do
B. what she wants to do
C. she wants to do what
---What are you going to be in the future?
---- ________ engineer.
A. AnB. AC. The
My English teacher helps me _______ my English every day.
A. with B. on C. of