155. The teacher was a little angry becausethe students didn’t _____ their exercise books on time.

The population of Shenzhen is than that of many other cities in China.

Please tell Jim to call me as soon as you ___ himtomorrow .—-All right ,I will .

Today Chinese ______by more and more people around the world.

Mr. Thompson, without _________timely help finishing the task would have been out of the question, fell ill last week.