大学英语：a manager does是省略that的定语从句，修饰先行词everything

　　当先行词为everything， something， anything， nothing等不定代词时定语从句引导词不可用which， 此句的后半部分 some suggest that …… 是宾语从句suggest v. 认为，提出，建议(其后的宾语从句多用于虚拟语气)

　　4.although conj.“虽然，尽管”引导让步状语从句

　　例如：Although my car is very old，it still runs very well .

　　虽然我的汽车很旧，但是仍然跑得很好。

　　require vt. 要求，需要 后边由that引导一个宾语从句

　　5.Often managers must make a best guess at what the future will be and try to leave as little as possible to chance， but since uncertainty is always there， risk accompanies decisions.

　　make a best guess at 作出最佳猜测，at 表示动作或行为的方向和目标，如：look at (看) ，aim at (瞄准，目的是)，throw (a stone) at (向…掷石头)，shoot at (射击)，laugh at (嘲笑)

　　本句中what the future will be 是一个介词宾语从句，(作介词at 的宾语);

　　to leave sth. to chance “凭运气，听任命运的安排，听其自然发展”

　　“as + 形容词(或副词)+ as possible”意思是“尽可能地…; 尽量”。

　　as little as possible 尽可能少

　　I tried to be as friendly as possible. 我尽量地表示友好。

　　Come as quickly as possible. 尽快来。

　　since uncertainty is always there 是一个原因状语从句。

　　risk accompanies decisions .风险伴随着决策

　　6.sometimes … at other times 有时… ，而有时则 …

　　a poor decision 一个不良决策