73. --- You just think of yourself! You kept me waiting for at least three hours.
--- I’m sorry that you _____ think so.
| A．will | B．would | C．should | D．Could |
It was at midnight ______ he got to his friend’s house．
| A．when | B．since | C．that | D．while |
The global warming is more and more serious, for which human beings ______．
| A．are blaming | B．are to blame |
| C．are going to blame | D．are to be blamed |
--- Grace won’t like it, you know．
---______ ? I don’t care what Grace thinks．
| A．So where | B．So what | C．So why | D．So how |
It is said in the book that Tomas Edison （1847-1931） _______ the world leading inventor for thirty years．
| A．would be | B．has been |
| C．was | D．had been |
The old couple preferred a flat in a small town to ______ in so large a city as Chongqing．
| A．this | B．it | C．that | D．one |