请教一道高中英语改错题~~~

请教一道高中英语改错题~~~
I like riding my bike.Though it is not very new,but it is ___
my best friend.I find very convenient to go anywhere with a ___
bike.Ride gives me not only exercise but also pleasure.I ___
use my bike mostly on summer when the weather is warm ____
and dry.It can very unpleasant in winter when it is cold and ___
rain is pouring down.It can also be very danger.Of course ____
I will be very careful on my blke.In facts,accidents are not ____
the only problem.One day I went to school and come back ____
to find his front wheel was missing.It was a long walk to____
the repairer's shop.Now I have two strong locks. ____