Look before you leap! Why not ________ the advantages against the risks before you start?
______the end of last term, every student in the school, I think, has taken at least five maths tests.
We often call Martin Luther King M.L.King ___ .
Look out____the traffic when crossing the road.
The bridge is 1000 meters ____ length.
The two countries were ______ between 1989 and 1992.