葛根汤的组成是（）
A.麻黄汤加葛根
B.桂枝汤加葛根、麻黄
C.麻黄汤加葛根、栝楼根
D.麻黄汤合桂枝汤加葛根
参考答案：B
生男生女完全取决于母亲。[ ]
Mr. Smith is our teacher. He ______ English in our school for more than six years.[ ]
A. teaches
B. taught
C. will teach
D. has taught
