Questions 32 to 35 are based on the passage you have just heard.

A．Because cannabis proved to be more harmful than tobacco.
B．Because cannabis is already so widespread.
C．Because it is not known whether cannabis may be harmful or not.
D．Because cannabis is proved to be positively harmful.

A．Because he can earn much money to support his family.
B．Because his wife agrees with his present working way.
C．Because his present work is creative.
D．Because his work is useful to the people and the community.