شرکت در آزمون آنلاین
زبان انگلیسی 1
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زبان انگلیسی 1
| آزمون شماره 13117
In a general description, I would have to say that white blood cells help ............... the body against infection.
.......................... risk their lives every working day . Many of them have died while saving others.
The man stopped walking and looked in … at us, while we were making strange noises and playing jokes on each other in the street.
“A: Do you know where John is now?”
“B: He’s … still at work.”
