آزمون آنلاین زبان انگلیسی 2 - درس سوم | آزمون شماره 5165

Learning and being fluent in a language ......... time for sure; it doesn’t happen overnight.

Over the past five years, car companies got the message that they must make airbags to ……… buyers.

.The scientists say that many of those bacteria die  ............................. in the warm and dry air of our homes