Tim is in good shape physically          he doesn't get much exercise.  [ ]

A. if        

B. even though      

C. unless      

D. as long as

补写出下列古诗文中空缺的部分（每空1分，共8分）

小题1:然力足以至焉，                       ，                             ；

小题2:                      ，内无应门五尺之僮，                ，形影相吊。

小题3:臣以险衅，              。生孩六月，                。

小题4:亦欲以究天人之际，                   ，                      。