具有止痢功效的药物为
A．白及B．炮姜C．棕榈炭D．血余炭E．仙鹤草
参考答案：E
Sam _____ go out to play football with his friends _____ school was over yesterday.[ ]
A. won't; before
B. doesn't; after
C. wasn't; until
D. didn't; until
