大承气汤、小承气汤、调胃承气汤中共有的药物是（）
A.芒硝
B.大黄
C.枳实
D.厚朴
E.甘草
参考答案：B
The boy saw a cat ___________ under the tree.[ ]
A. play
B. to play
C. playing
Thanks _____ the photo _____ your family. [ ]
A. for, at
B. in, of
C. for, of
D. of, of
