—Oh, I've just locked my keys in my office again.

—You're always so careless, but ________ let's see what we can do about it.

A．otherwise

B．therefore

C．anyway

D．besides

我国射箭运动员张娟娟在2008年奥运会上获得女子个人金牌，打破韩国运动员对该项目的垄断。比赛中当她用力拉弓弦时，她的手也受到弓弦的拉力，这说明_____________ _________________的。