Life is full of troubles and sufferings. Just remember, keep a positive __________ and good things will happen.
12. Most American cities are relatively small _____ population when compared with Shanghai and Beijing.
10. ----What’s that noise? ----Oh, I forgot to tell you. The new machine _____.
9. After knowing the annoying news, she returned to work, _____.
8. He said that I would go abroad next month, ______?
7. Although there is a difference in spelling and pronunciation between American English and British English, both of the countries have much to _______.