单项选择题
Students should be encouraged to use（）Internet as（）resource.
A./；a B./；the C.the；the D.the；a
单项选择题 One potential danger is（）the information could be used by others to your disadvantage.
单项选择题 I had my meals（）when I was ill in bed with a bad cold.
单项选择题 Please prepare the medicine for me according to this（）
