---Jack was late for Mr. Smith’s oral class this morning.
---______? As far as I know, he never came late to class.
| A．How come | B．So what | C．Why not | D．What for |
The difficulty solving such a problem ten years ago was twice greater than ________ is today.
| A．it | B．that | C．as | D．what |
— Damn! I ________ more to avoid that!
— Don’t cry over spilt milk．Besides, it wasn’t your fault.
| A．could do | B．should do | C．might have done | D．would do |
These monkeys are such quick thieves that they ________ your bananas when you realize what has happened.
| A．will enjoy | B．are enjoying | C．have been enjoying | D．will be enjoying |
As the ________ of Thomas Edison shows, a child who typically questions the most common facts may turn out a genius as a grown-up.
| A．case | B．situation | C．condition | D．way |
It was your lie about your education background ________ cost you the opportunity to get the job.
| A．which | B．it | C．that | D．and |