___________
A. To recharge it.
B. To return it.
C. To repair it.
D. To sell it.
_______________
A. To make an appointment.
B. To confirm the delivery.
C. To ask about the man’s order.
D. To complain about the
_______________
A. They are user-friendly.
B. They are popular abroad.
C. They are newly developed.
D. They are of high quality.
关贸易协定是在( )正式生效的
A. 1950年
B. 1947年
C. 1948年
D. 1945年