Xi’an was the last city ______ he visited when he came to China.
.This isn’t the most difficult one of the new words that ______ me in the passage.
According to the reports, one of the rare animals, ______ South China Tiger, is in ______ danger of dying out.
—Can I take your order now? —______. Could I have a few more minutes?
Afer decades of effort, the city is still trying to_______ how to ban smoking in public places.
.____reasonable, the idea____to create a friendly environment attracted much public attention.