根据句子意思，从方框中选择恰当的单词填空，部分单词在填入时需进行词形变换．每个单词只能选用一次，每空只能填一词．
| sound；or；run；teeth；who；invite；healthy；few；my；thousand |
71．It’s a good habit to brush your
after each meal．
72．There will be
of visitors going to London for the coming Olympic Games in July this year．
73．Eating lots of vegetables and fruits can make our body strong and
74．Tom and Jack are
fast on the school playground now．
75．To
surprise，I found that blind girl could play the piano wonderfully．
76．Kate received an invitation．She was
to Happy Camp．
77．Protecting our environment is necessary，we should plant more trees and use
cars．
78．--It’s a fine day．Let’s go hiking．
---That
great．
79．Dave is a very young cook
can offer us much rich food．
80．Work hard，
you won’t be able to pass the exam．