根据上句填写下句，使其成为完整的句子。     

1．只要工夫深，                                  。    2．少壮不努力，                                  。 

3．三个臭皮匠，                                  。    4．众人一条心，                                   。

5．日晕三更雨，                                 。     6．东虹轰隆                                           。

7．书山有路勤为径，                            。   8．谦虚的人学十当一，                                   。

肾小管分泌过程是

A．被动转运

B．主动转运

C．促进扩散

D．胞饮作用

E．吞噬作用