I’ve kept up a friendship with a girl whom I was at school ________ twenty years ago.
Knowing office rules, whether ______ or not, is always of great importance, especially for young job seekers.
I really can’t ______ with the noise that is going on outside. It is driving me crazy.
—I hear that you have won the lottery. —Not once in my life ______ until now.
Contrary to our ______, the Chinese Men’s Football Team lost to Iraq.
The course that Beijing University offers normally attracts 30 foreign students per year; _______ up to half will be from America.