Did you have fun _____________ TV at home?[ ]
A. watch
B. watched
C. watches
D. watching
答案:D
在牙防所局部用氟预防龋齿研讨会上,专业人员就各种措施和方法进行探讨,对含氟牙膏的应用。
含氟牙膏的儿童用量()
A.和成人一样
B.不能使用
C.黄豆粒大小的量
D.农村用量要小
E.城市用量要大
In the middle of the room stands a__________ table.
A.beautiful wooden round
B.round wooden beautiful
C.wooden beautiful round
D.beautiful round wooden