—Must all the passengers in the airbus be foung now?
—No, they ________, because none of them is affected by the flu.
| A．mustn’t |
| B．needn’t |
| C．can’t |
| D．may not |
On the celebration of the university’s 100th birthday, he said, “I have never experienced __________ time here as a graduate of Tsinghua University.”
| A．a better | B．the best | C．the better | D．a best |
Only when to explain thereasonfor this.
| A．didhestart;she realized | B．hestarted;didsherealize |
| C．didhe start;she hadrealized | D．hestarted;hadsherealized |
Large earthquakes __________ the ocean can create a series of huge, destructive waves called tsunamis that flood coasts for many miles.
| A．beyond | B．beneath | C．off | D．across |
He is so addicted to smoking that ________ seems to be no chance of talking him into quitting.
| A．this | B．what | C．it | D．there |
--- He is a very hard-working student．
---________．As far as I know, he often burns the midnight oil．
| A．You can say that again | B．Absolutely not |
| C．Heaven knows | D．No way |