Not once________to Michael that he could one day become a top student in his class.
| A．occurred it | B．it did occur |
| C．it occurred | D．did it occur |
At first sight, it ________ look like a generous offer; actually, it is a trick.
| A．may | B．must | C．shall | D．should |
Tom was so wild about computer games that he would stay online for ten hours _____every day.
| A．in the end | B．in particular | C．on end | D．on purpose |
It takes a long time to ____ a good name，but this name is quickly lost by just one piece of bad behavior.
| A．pick up | B．think up | C．build up | D．make up |
According to the rules of the factory, you can ask for leave ________ you have a doctor’s diagnosed note.
| A．now that | B．on condition that | C．unless | D．even though |
Bob is in a hopeless situation, ________ we should keep a close eye on.
| A．which | B．where | C．that | D．when |