A car engine cannot run smoothly without motor oil.____ our body cannot function efficiently without vitamins.

Those poor and needy teenagers were excited to find a shop at the corner where they could buy ____ priced bikes.

By the time the fire-fighters arrived, the fire had been put＿＿＿by the teachers and the students. 

-----Have you been to New Zealand? -----No, I’d like to, _____.

“If you’re walking down the right path and you’re willing to keep walking,_____ you’ll make progress”, said the president Obama.