21. Mianyang, the science and technology city of China, is located _____ the northwest of Sichuan. It’s also a beautiful city _____ the Fujiang River.
A. on; on B. on; in C. in; to D. in; on
22．Buses were not able to go normally on the road because of the heavy snow and more than one student ______ late for school that morning.
A. have been B. has been C. were D. was
