单项选择题
A.saying B.to say C.say D.said
（）every day for 20 minutes.A.ExerciseB.To exerciseC.Sho...
单项选择题（）every day for 20 minutes.
A.Exercise B.To exercise C.Should exercise D.Exercising
I tried（）the book in a few days, but actually I couldn'...
单项选择题I tried（）the book in a few days, but actually I couldn't, just because of too much work for me.
A.finish B.finishing C.to have finished D.finished
Although I am a good swimmer, I don't like（）in the sea....
单项选择题Although I am a good swimmer, I don't like（）in the sea.
A.swim B.swimming C.to be swimming D.to go to swim
