They ______ two free tickets to Canada, otherwise they’d never have been able to afford to go.

Can I have __________ pieces of bread— Sorry, there’s __________ left.

The purpose of our advertising is to _________ customers’ attention to our product.

Tu Youyou is famous ____ her medical research and won the Nobel Prize this year.

Zhengzhou will be more and moreconvenient when Zhengzhou Subway_____ in two years.