This part of the library is only ______ to people over eighteen years old.
It is not rare in _______ that people at the age of forty are going to _________university for further education.
There is a popular opinion among teachers _____ reviewing the lesson after class can help students learn better.
Why not __ your new ideas? Otherwise you will never know whether they are possible or not.
He is _____ to staying up and getting up late, which is a bad habbit。
---Business is going down, and I’ve lost lots of money in the stock market. ---_____. Everything will work out fine.