What action should they _______ such a thing happening again?
| A．do stopping | B．take stopping |
| C．take to stop | D．do to stop |
If it had been fine yesterday, we could have watched that air show. But it _____________ all day.
| A．has rained | B．had rained | C．rained | D．rains |
Which of the following pictures means “Please don’t make any noise”?
If our parents do everything for us children, we won’t learn to depend on _________.
| A．them | B．us | C．themselves | D．ourselves |
---All the oil in the world will have __________ some day.
---Yeah. What shall we use for power at that time?
| A．given away | B．put away | C．run out | D．set out |
---Tom’s father looks very serious.
---___________ he is very kind.
| A．Though | B．If | C．And | D．But |