第二节单词拼写（每题0.5分，共5分）
根据下例句子中的首字母和汉语提示写出单词，注意单词的正确形式。
86. Being e______ to sunlight for too much time, as the doctors say, will do harm to one’s skin.
87.The Expo site (世博园区) should be a_______ from anywhere in the city of Shanghai within 90 minutes by bus, subways and special taxis.
88.—You mean the position is still ______ （空缺）?
—Yes, but you must know our job is very demanding.
89. I sent for a technician in case John is not f______ with the computer software they use.
90. There is a high p______ that those earthquake-stricken areas will be hit again.
91. Modern household appliances have brought us great ______ (方便) .
92. I recommended c_______ out a survey among students about short-sightedness.
93. Parents are advised to listen to their kids rather than argue with them. Listening doesn’t _______ (必然，必定) mean agreeing.
94.You may be feeling fine at the moment. But there exist some ______( 潜在的) risks in smoking in bed.
95.Penicillin was f__________ to saving millions of lives and is one of the most important medicines of contemporary society.
定义运算：a⊕b=
