1：Obviously，if we don't control the problem, the chances are that……will lead us in danger.(很明显，如果我们不能控制这一问题，很有可能我们会陷入危险)

　　2：No doubt, unless we take effective measures, it is very likely that ……(毫无疑问，除非我们采取有效措施，否则我们很可能会……)

　　3：It is urgent that immediate measures should be taken to stop the situation(很紧迫的是应立即采取措施阻止这一事态的发展)