It is reported that Beijing and Zhangjiakou（张家口）will compete to host the 2022 Winter Olympics, which will _____ China’s social development

It’s impossible for us to work out the Math problem in just 10 minutes. It’s too difficult.—You’re right. We can’t be _______ careful while working on it.

The infrastructure of a country is makes everything run smoothly，including things like transport， irrigation， electricity，postal service， telephones and schools

In our class there are 46 students, _______ half wear glasses.

Many people like watching _______TV series In the Name of People now. Have you seen it , Mary—Yes, it’s quite ______ excellent play, so I can’t wait to turn on the TV when I get home.