While they were playing, a bomb _____ on the Bay Bridge, and one boy was injured seriously.
__________ full preparations, we decided to put off the meeting till next week.
In such dry weather, the flowers will have to be watered if they ____________
It is the protection for the trees___________ really matters, rather than how many trees are planted.
We can’t go on with the experiment because the computer_________.
The two sides have finally___________, though some small differences still exist.