1 . We first broke the law in a way which was peaceful; when this was not allowed...only then____________________(我们决定） to answer violence with violence.

2 . Two-thirds of them died or _____________________(injure) during the earthquake.

3 . This_____________________the two countries were at war.
这是在两国交战的时期。

4 . A recent research shows that there _____ volcanic activities on the moon and Mars. However, they no longer exist now.

A．had been

B．has been

C．were

D．would be

5 . In front of the farmhouse________.

A．lay a peasant boy	B．laid a peasant boy
C．lie a peasant boy	D．did a peasant boy lie

6 . Tom caught several fish after three hours, and only then ______ that the secret of success was patience.

A．he realized	B．did he realize
C．he had realized	D．had he realized