动物微生物学

A. To make an appointment.
B. To ask about the man's order.
C. To confirm the delivery.
D. To complain about the service.

A. They are user-friendly.
B. They are newly developed.
C. They are popular abroad.
D. They are of high quality.

A. It wouldn't start.
B. It ran out of gas.
C. It was broken.
D. It was missing.

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