_______________
A. It has to be charged.
B. It is of good quality.
C. It is still new.
D. It was bought a year ago.
___________
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.