选出错误的一项。

( )1. John go to school at 8:00.

              A   B  C

( )2. This are my skirt.

             A    B   C

(      )3. Is that you dress?

                  A    B     C

( )4. where are they?

               A     B    C

(      )5. It's time to dinner.

              A   B   C

( )6. What's time is it?

                A      B   C

(      )7. Lets  run.

              A     B

(      )8. It's time for go home.

             A          B          C

(      )9. The canteen is in the first floor.

              A               B C

(      )10. Where is the teachers desk?

                   A    B           C

铲斗后壁材质是（）。

A.ZG35CrMo

B.ZG35

C.35GrMo

D.高锰钢