选出句子中错误的一项，并把正确答案写在横线上。(10分)
（1）Usually I comeby foot.
A B C （ ）______________
（2）How do you get the USA from China?
A B C （ ） ______________
（3）Slowup and stop.
A B C （ ） ______________
（4）I must to pay attention to the traffic lights.
A B C （ ） ______________
（5）There are many picturesfor lights.
A B C （ ） ______________
--Wow, your school is cool!--____________.
A. Yes.B. Thank you. C. You’re welcome.
It’s cold ____ Beijing.
A. onB. isC. in
It’s 9:45.It’s time ____ music class.
A .to B. for C. of
--Do you have a library?--____________.
A.Yes, it is.B. Yes, we do.C. No, it isn’t.
My classroom is on the _______floor.
A. firstB. oneC. two