根据汉语提示，完成句子。（每空一词，每空0.5分，计5分）

66.All of us should______ ______(小心)when we are walking on the street.

67.The train station is not_______ _______（远离）here,Let’s go on foot.

68.History is very interesting. It can help us _______ _______（了解）the past.

69.There are many shops and restaurants______ ______(靠近) my home.

70.The bookstore is________ _________（在……对面）the school.