Which of the following is experiment time?

A．8:00-22:00 on Saturday.

B．10:00-21:00 on Wednesday.

C．8:00-11:30 on Monday and Thursday.

D．18:00-21:00 on Sunday, Monday, Thursday.

If you want to be a volunteer, you should _____________.

A．come from Asian countries

B．be able to get up early in the morning

C．be free at certain time next two weeks

D．call the office of the department of psychology

How much will you be paid after three hours’ experiment?

A．30 yuan.

B．60 yuan.

C．90 yuan.

D．120 yuan.