Second, 1. Take her dog for a walk every day. 2. Play football. 3. Go to work by bike every day. 4. A week ago. 5. What do they do to keep healthy?

Three. 1.E 2。 B 3。 A 4。 C

4. 1. You'd better attend 2. I'm too sleepy to sleep. Why don't you spend some time? How long have you been gone?