光滑水平面上静止一质量为M的木块，一颗质量为m的子弹以水平速度v1射入木块，并以

In your life，nothing happens by chance or by means of good or bad luck．Everything        to test the limits of your soul．Without these small tests，life would be like a smoothly paved，     ，flat road to nowhere．Safe and comfortable but dull and pointless．
If someone        you or breaks your heart，forgive them for they have helped you        trust and the importance of being cautious to whom you open your heart to．If someone loves you，love them back        ，not only because they love you，but because they are teaching you to love and opening your heart and        to things you would have never felt or seen without them．
Make every day count．Appreciate every        and take from it everything that you possibly can，for you will never be able to experience it again．

小题1:	A．takes B．occurs C．shows D．breaks

小题2:	A．busy B．muddy C．straight D．enjoyable

小题3:	A．wins B．interests C．influences D．hurts

小题4:	A．look through B．1earn about C．watch out D．adjust to

小题5:	A．unconditionally B．desperately C．intentionally D．instantly

小题6:	A．arms B．mouth C．brain D．eyes

小题7:	A．success B．failure C．moment D．challenge