Whose book is this?

这是谁的书？

Do you speak English?

你说英语吗？

I used to set my alarm clock for exactly 7 a.m.

我过去常将闹钟调为上午7点整。

There have been a lot of changes here in the last 20 years.

在这20年里这里有很多变化。

According to Mr. Green,this is a complicated problem.

对于格林先生，这是一个复杂的问题。

Let's make a date to go shopping next Thursday.

让我们确定下星期四去购物的时间。