( )You should't _ too much about the marks.It's important for you to do your best.A.worry B.worried C.worrying D.worries I could ride a bike when I was 5 years old.=I _ _ _ ride a bike at 5.
问题描述：
( )You should't _ too much about the marks.It's important for you to do your best.
A.worry B.worried C.worrying D.worries
I could ride a bike when I was 5 years old.=I _ _ _ ride a bike at 5.
答
1.A (情态动词接动原)2.was able to
答
A
was able to