___ it ___ to rain tomorrow, the sports meeting will be put off until the same time nest week.
They no longer have to ______ large numbers of temporary workers to do the harvesting.
_________ many times, but he still couldn’t understand it.
It is to read the books our teacher recommended , for they are well _____ reading.
He was so __________ a key university that he would work until late into the night.
-Look! Everything here is under construction.-Oh, has the building once _________ for exhibition been pulled down, too?