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.

3 . A snowboarder was feeling lucky to be alive yesterday after a helicopter rescue(直升机营救).

Ben Akintola, 30, was snowboarding in the French Alps under a clear blue sky in the afternoon when a large amount of snow fell down the side of the mountain. He didn’t have time to escape(逃脱) and it hit him with full force and knocked him senseless.

He woke in the night in total darkness. He was lying on an icy rock. Amazingly, he still had a mobile phone signal(信号), so he called a friend a thousand kilometers away in Britain. His friend called the French rescue services.

“I was waiting for what seemed like hours on that rock. I was beginning to give up hope when I heard the sound of a helicopter. It was circling around in the darkness, looking for me. I was trying my best to wave my mobile around. Fortunately the helicopter pilot saw the light.”

“I was overjoyed when the helicopter headed my way. It stayed above me and began lowering a rope.”

Ben was in hospital last night but he was not being treated for any serious injuries. He’s looking forward to going home today.

The French rescue services said: “We were very pleased that we were able to save Ben. The risk of snow slide off-piste(非滑雪场地的) is much higher at this time of year. All snowboarders and skiers should stay on the ski runs and not go off-piste. Ben was very lucky.”

A man looking at his Smartphone while walking across a railway    1     (have) a close knock on Oct 22. He was so    2    (absorb) in his Smartphone that he didn't see a train approaching until it brushed past him,    3    (throw) him to the ground. This should serve    4    a warning that people should be aware of their surroundings, especially    5    crossing roads.    6    (lucky), the man survived, but the incident forced the driver     7    (stop) the train. An l8-minute delay followed the incident,    8    led to a break in the running of other trains on the route.

The Smartphone    9    (addict) has spread like an infectious disease. It's evident that it will do great harm to society. What's even    10    (bad),some addicts become impatient with relatives and friends. Some people blame the Smartphone for the sad story, yet in fact people's weakening self-control and self-discipline are to blame.