19．16．Why didn't Ann finish her homework？
A．She was ill．
B．Her book was lost．
C．She only played computer games．
17．How does Brad feel about Ann's problem？
A．He isn't surprised．
B．He is very angry．
C．He's excited．
18．What did Brad advise Ann to do？
A．Eat less food．
B．Spend less time on the computer．
C．Learn more about computer．
19．Who will take a run in the morning？
A．Only Brad．
B．Only Ann．
C．Both Brad and Ann．
20．How long will the morning run last？
A．Ten minutes．
B．An hour．
C．Thirty minutes．
