If a computer crashes,you will lose the file you _____ on if you don’t save it early enough.
____ in reading the novel , he knew nothing about what was going on about him.
By this autumn they _____for ten years .
The child was ____to go fishing alone because it was dangerous .
You ______ be hungry already — you had lunch only two hours ago!
The old tower must be saved, _______ the cost.