关于淀粉酶的测定，正确的是（）。 A.血清淀粉酶在起病后24小时开始升高 B.测得值

My aunt bought me a bicycle on my ninth birthday. She told me to learn to ride by ___36___. But I really didn’t know___37___to ride a bike. What should I do? First, I watched the other people ride. Then I pushed out the bicycle from my house. I was ___38___ I’d fall down and hurt my knees. But I knew I had to get on it sooner or later. So I___39___ to get on just like what the other people did. But I fell off twenty___40___later. Just at that time, my aunt came out from the ___41___. She told me to practice again and again. So I got on the bike a second time, and fell off a second time. But I never gave up. I practiced a third time, a fourth time …. I could be on it ___43___every time I tried again then before, 5 minutes, ten minutes, half an hour… until I could.
Like anything in life that you want to learn how to do or to be good at, you have to practice to ___44___it happen. Diligent practice is the key to success___45___you really want to learn to do a thing. More practice helps you to improve on the skills that you learn and ingrains （使根深蒂固）them in you until you can do it.  
小题1:  

A．herself

B．yourself

C．myself

D．himself

小题2:	A．how B．what C．where D．when

小题3:	A．happy B．surprised C．interested D．afraid

小题4:  

A．had

B．tried

C．like

D．hate

小题5:	A．seconds B．minutes C．hours D．days

小题6:  

A．school

B．house

C．farm

D．village

小题7:	A．fifth B．fourth C．third D．second

小题8:  

A．shorter

B．longer

C． safer

D．dangerous

小题9:	A．practice B．enjoy C． make D．set

小题10:  

A．if

B．when

C．until

D．after