شرکت در آزمون آنلاین انگلیسی 3 - انگلیسی 3 | آزمون شماره 11647

..................................... are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the moon and the sun , and the rotation of the earth.

The library is said to owe its existence to Petrarch’s … of his books. Most of these have now disappeared.

It seems that the American officials do not feel any responsibility to meet their moral … with respect to people’s living problems.