一、1.C 2.B 3.A 4.C
二题目略
1.is reading 2.arejumping
3.are swimming 4.is making
5.are having 6.are playing
7.is doing 8.is watching
三、题目略
1.What are you doing?
2.Are you eating/having lunch?
四、1—F 2—C 3—A 4—B 5—E 6—D