21. — Jay Chou is in our city. Let’s go and watch his show this Saturday.— That’s great, but I need to call my dad and ask for _________ before I go out.
There is no possibility ______ all the students can pass the college entrance examination.
More wild tigers have been seen in the forest around this area, ____ there used to be very few.
I’m quite interested in Spanish history, the civil war in Spain _______.
Professor Wang introduced us a new approach ________ learning a foreign language at yesterday’s meeting.
He decided to study _____ second foreign language in order to find _____ well-paid job.