She usually a bus to school.A. buysB. bringsC. takesD. by

问题补充：

She usually a bus to school.

A. buys

B. brings

C. takes

D. by

答案：

A. buys

B. brings

(答案→)C. takes

D. by

解析：乘坐公共汽车去上学，常用take a bus to school，也可用介词by，此时不用冠词，by bus，句意：她通常乘公共汽车去上学。所以选C。