Life is like riding a bicycle. ________ your balance, you must keep moving.
She wondered what use she would _______ this chance.
_____ learn more knowledge, the students stay at school on Sunday.
The two companies are competing ___ each other to get into the Chinese market.
If you don’t want to choose the thinner one, ___.
---What do you think of the movie?----,_____, the movie isn’t interesting enough, though lots of money has been spent on it.