In the global economy，a new drug for cancer，________it is discovered，will create many economic possibilities around the world.
| A．whatever | B．whoever | C．wherever | D．whichever |
The reason ________ is given for her absence is _______ nobody reminded her about the meeting.
| A．which ; because | B．that ; that |
| C．/ ; because | D．why ; that |
.It is the first time the students ________ to Hyde Park.
| A．have gone | B．have been gone |
| C．had gone | D．had been gone |
.Bicycles made in China are cheaper than ________ made in Japan, but almost as good in quality.
| A．ones | B．it | C．that | D．those |
.I shall never forget the day _______ Shen Zhou V was launched, _______ has a great effect on my life.
| A．when ; which | B．that ; which |
| C．which ; that | D．when ; that |
While working in the countryside , the students ________ a great deal of knowledge on plant life.
| A．looked up | B．picked up | C．put up | D．called up |