___________ certain that his invertion will lead to the development of production.
Susan’s face turned red when she found the teacher’s eyes _____ her.
I can’t help _____ myself on passing the examination.
I’m not sure if I should get a part-time job when I’m in college and that is ______ my parents’ opinions and mine differ.
This series of products ______ in special price for a month to promote its sales from next month.
Nowadays teens prefer going to the cybercafé ,_____ ,as is known to us, they can chat with their friends by QQ or play games.