Under no circumstances in the last three months______ for leave because of personal affairs．
| A．did she ask | B．she asked |
| C．has she asked | D．she has asked |
There is something wrong with his throat; ______, Michael has to give up the singing competition.
| A．as a matter of fact | B．on the whole |
| C．as a result | D．in particular |
The impatient driver received a ticket for speeding. He _______ so fast.
| A．mustn’t have driven | B．wouldn’t have driven |
| C．couldn’t have drive | D．shouldn’t have driven |
Lin Tao, who is said to have settled in the UAS recently, ______ in my neighborhood for four years.
| A．lived | B．has lived | C．had lived | D．was living |
If a ball is placed near a fire, the ball will _______.
| A．explore | B．extend | C．exchange | D．expand |
Find information in today’s world is not difficult. The _____ is how you can tell if the information is reliable or not.
| A．ability | B．competition | C．challenge | D．knowledge |