On August 14, 1996, a tiny drop     1     a very toxic（有毒的）chemical called dimethyl-mercury（二甲基汞）fell onto the left hand-of Karen Wetterhahn, a toxicologist and professor of chemistry at Dartmouth College. Wetterhahn was an expert on     2     toxic metals cause cancer. When the poisonous drop fell onto her hand, she wasn’t     3     (worry); she was wearing protective gloves.

    4     (unfortunate) the dimethyl-mercury went through her glove. After a while, Wetterhahn     5     (have) difficulty walking and speaking. After three weeks, she was in a state of deep unconsciousness. Karen Wetterhahn died five months later. She was 48 years old, a wife and mother of two.

You might say that a toxicologist studies substances that lead to     6     (die). But toxicology is also about saving lives. What can kill, can cure. Medical     7     (research) such as Weterhahn risk their lives daily for the benefit of others. Their work is dangerous, but it has the potential     8     (save) lives. In memory of Wetterhahn’s life and work, Dartmouth College created the Karen Wetterhahn Memorial Award. The award     9     (give) to female science students     10     receive money to continue their scientific research.