The  roller coaster there  moved _______ high speed.

1. A.
   in
2. B.
   on
3. C.
   with
4. D.
   at

The  roller coaster there  moved _______ high speed.

用所给词的适当形式填空

1.We ______________________(not see) each other since last week.

2.The roller coaster moved at high speed and was very _____________(excite).

3.We _______________(wait)for the bus when a traffic accident happened.

4._______________(be) pollution a serious problem then?

5.All of us went on a school trip to South Hill except ____________(he) last week.