—It shouldn't take long to clear up after the party if we all volunteer to help.  

—That's right.       .  [ ]

A. Many hands make light work

B. Something is better than nothing

C. The more the merrier

D. The sooner begun,the sooner done

报关企业及进出口货物收发货人报关注册登记证书的有效期均为3年。