三、动词填空
1. The children
were hiding
(hide) behind the tree when we found them.
2. The old man's house caught fire because lightning
hit
(hit) it.
3.
Was
he
making
(make) a snowman when you saw him?
4. Our teachers often tell us
to calm
(calm) down first when we are in danger.
5. — Why didn't you say anything?
— Sorry, I
was thinking
(think) about how to prepare for the coming exam.
6. What should we do
to protect
(protect) ourselves from thick smoke?
7. Mary
was talking
(talk) on the phone, so I just nodded to her and went away.
8. He kept
speaking
(speak) without noticing the loud noise outside.
9. Remember
to stay
(stay) calm when there is an accident.
10.
Don't go
(not go) back to the building on fire. It's too dangerous.