1.There is a book on the desk.课桌上有一本书.

2. How many people are there in the city?这个城市里有多少人口. 3.There is a pen and two books on the desk.课桌上有一个钢笔和两本书. 4.There is a lot of work to do (to be done). 有许多工作要 做。

5.There was no time to wait for you. 没有时间再等你了。