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　　1.結(jié)論型
　　I agree that we need to make sure that animals used for testing new products have the minimum of suffering. Nevertheless , I’m convinced that animal testing is necessary, and that it will benefit humans in marvelous and new ways.
　　2.建議型
　　While we can’t work it out immediately, still there are methods. The most popular is … Second one is … Third one is …
　　3.揭示后果型
　　We must call for an immediate solution, as the current situation of … ,if allowed to proceed, will surely lead to the heavy cost of …
　　4.號召型
　　It’s time that we urged an immediate end to the undesirable tendency of …