He broke his legs while ＿＿＿＿＿.
| A．riding | B．ride | C．was riding | D．rode |
We didn’t plan our art exhibition like that but it _____ very well.
| A．went on | B．tried out | C．worked out | D．carried on |
I was still sleeping when the fire , and then it spread quickly.
| A．broke out | B．put out | C．came out | D．got out |
Driving a car is not so difficult as you imagine, if you _____ the rules.
| A．depend on | B．believe in | C．turn to | D．stick to |
Remember not to ____ when you enter the room.
| A．look up | B．look round | C．look into | D．look through |
Suddenly the small boy stopped and bent down as if to _____ something.
| A．set off | B．pick out | C．pick up | D．set up |