آزمون آنلاین انگلیسی 3 - درس سوم | آزمون شماره 72

Because garbage ……… directly into a liquid fuel, it can be used in cars, trucks, buses and airplanes.

What do you feel when you ……… a city with no air and noise pollution and no traffic jams?

This medicine ...................... every ۶ hours ; you will feel better after a while for sure.