Guess, how much does it cost—I think itcosts 15 and 20 dollars.

e cars are bringing us convenience, they may also cause more trafficaccidentsand pollution

____ he met with the difficulty did he realize that our help was of great importance

It seems that living green is _____easy and affordable A small step masks a big difference [ ]

I was scared and feeling pretty anxious, ____in a new country.