21—25DBBAC26—30CBDAB
31.Because his body becomes hot,and there is pain all over his body.
32.People can see them with a microscope.
33.Because there are a lot of germs init.
34.They are found everywhere,in dirty water,air and dust.
35.It will become big and red and people will have much pain in it.
36—41CAFDBE
42.47043.THEFIRST HOTEL22244.The First 45.English.
46.On September 11.47.6.
48.No.Nigel has the ability to do a lot better.
49.More work is needed.50.She has to work harder than before.