IT / IMPORTANT /US/LEARN/USE/ ROADS PROPERLY / SAFELY. A. IT IS IM...

39. It / important /us/learn/use/ roads properly / safely. A. It is important for us to learn to use the roads properly and safely. B. It is important to us to learn use the roads properly and safely. C. It was important for us to learn use the roads properly safely. D. It is important to us to learn to use the roads properly and safely