آزمون آنلاین زبان انگلیسی 2 - درس دوم | آزمون شماره 1850

When Sadra was at school, he ......... to play the guitar. He ......... it ever since.

Most people know that exercise is a healthy hobby, but they don’t know the ......... way to do it.

.The scientists who have succeeded are those who have ............................... one subject and worked hard on it

As you know , in the new century, space travel is one of the wonders of modern  ........................................    .