آزمون آنلاین انگلیسی 3 - درس دوم | آزمون شماره 10158

They asked me a lot of questions, most of ……… I couldn’t answer.

.The most ....................... minerals to the human body are salt for maintaining water levels , iron for red blood cells , and calcium for bones

This country hasn't had enough rain in the last ۱۰ years , so many rivers run dry during the ........................ .