It was 80 years before Christopher Columbus crossed the Atlantic _ Zheng He had sailed to East Africa.(2012.重庆)
How do you guess ________?
With his horse ____to the tree, the man had a rest in the shade.
The boy broke the rule ______ he got punished.
The meetings are very short, so there is little _____ to have a real discussion.
After the heavy rain, the level of the lake rose ___ 1 meter ___ 8 meters.