___ has already been pointed out is that grammar is not a set of dead rules.
He stayed up late last night,_______for the exam that would take place next week.
Mount Wutai,_____we visited last month,attracts hundreds of thsousands of vistors every year.
Not able to______city life, Granny decided to go back to the village and live in peace there.
---Many species are now in danger of dying out.----True.Measures should be______to protect them right now.
.It is reported that two schools,_______fell into ruins in the earthquake, are being rebuilt and will be open next term.