It is the most instructive lecture that _____ Isince I came to thisschool.
| A．attended |
| B．had attended |
| C．am attending |
| D．have attended |
While large numbers of residents in this area ______ the A/H1N1 flu, very few suffered death.
| A．picked up | B．took up | C．brought up | D．caught up |
He kept thinking of the question whether it was ____ for his father to change the habit of a life time in such a short time.
| A．possibly | B．probable | C．likely | D．possible |
—When did your cousin begin to show his interest in medicine?
—It was a Saturday ___ she noticed her uncle experimenting on a frog in his lab.
| A．that | B．what | C．when | D．which |
____ has been heated discussion over which country bakes the world’ s best pizza: Italy, where pizza began or the US, where it was globalized.
| A．It | B．There | C．That | D．This |
It was ____ exciting news that more than ten students in a single school were admitted to Tsinghua University in the same year.
| A．one | B．an | C．/ | D．a |