分类：教育/科学-外语学习
问题：英语题Thankyouforallyourhardworklas 
Thank you for all your hard work last week.I don~t think we ____ without you.A could have managed   B can have managed为什么选AA有用于可定句中做可能已经的意思而B一般用于疑问和否定句做对过去的推测的意思。此句不是否定吗I ran ______ catch uo with the man before me.A as quickly as I could toB as fast as I could Thank you for all your hard work last week.I don~t think we ____ without you.A could have managed   B can have managed为什么选AA有用于可定句中做可能已经的意思而B一般用于疑问和否定句做对过去的推测的意思。此句不是否定吗I ran ______ catch uo with the man before me.A as quickly as I could toB as fast as I could to选什么 为什么
回答：I ran ______ catch uo with the man before me. 
A as quickly as I could to 
B as fast as I could to 
选什么 为什么


选A  quick形容动作迅速 
fast一般形容时间等过的快