50 What is the main purpose of this passage?
(A) To introduce tourism and sightseeing in Yemen.
(B) To raise funds for Yemeni schools.
(C) To show Yemeni students’ enthusiasm for education.
(D) To encourage more English instructors to teach in Yemen.

I sat in on an English lesson at the Gamal Abdel Nasser Secondary School. 

The Scottish蘇格蘭 instructor大學講師—one of three Britons英國人employed in the Yemeni葉門 school system—was drilling the class in the difference between the “present simple” and the “present continuous”. 

There were twenty very thin, very eager boys aged between about fourteen and twenty-two. 

They were part of that tiny educated leaven in a country which has an illiteracy文盲 rate of ninety percent, and they had tense緊張, ambitious faces. 

They had been trained to compete continually連續地 against each other, so that the lesson turned into變成 a kind of noisy greyhound靈犬 race. 

The moment that the instructor was half-way through a question, his voice was drowned by shouts of “Teacher! Teacher! Teacher!” and I lost sight of him behind the thicket of urgently急迫地 raised hands. 

If a student began to stumble犯錯 over an answer, the others fought to grab the question for themselves, bellowing for the teacher’s attention. 

I once taught for a term at a comprehensive綜合 school in England: had the children in my class ever shown a small fraction of the enthusiasm displayed by these Yemeni students, I might have stayed in the job a great deal longer. 

They were ravenous for the good marks and certificates證明 which would take them out of their villages and tenements公寓大樓, and they behaved as if every minute spent in the classroom could make or break them.