题目

71. Many scientists made great _______________ (contribute) to the development of society. 72. Travel gives us the chance to ______________away from daily routine and experience something new. 73. __________from the construction mentioned above, you have also learned the following phrases. 74.Li Hui was ____________(expose) to cholera but luckily she did not become ill. 75.Our country is like a big family,__________(consist)of 56 nations.   71.______________72.________________73.________________74.________________75._________________   9．一个数除以3的商是两位数，这个数最大是297，最小是30．