As it reported, it is 100 years _____________Qinghua University was founded.
| A．when | B．before | C．after | D．since |
Fancy Williams not ______the answer to such an easy question ！
| A．know | B．to know | C．knowing | D．knew |
______letting go of a god chance like that ,the silly girl .!
| A．Fancy | B．Suspect | C．Suppose | D．Wonder |
Thes chemical ,_______to kill biological organisms ,are unsafe and oten not specific in their targets .
| A．having designed | B．to design | C．designing | D．designed |
It was reported that of the six people injured in the crash ,only two _______.
| A．ignored | B．recognized | C．buried | D．survived |
Medical ________shows that men are more likely to have heart attacks than women .
| A．evidence | B．entrance | C．identity | D．receptin |