Chọn phương án đúng nhất để hoàn thành các chỗ trống trong bài viết sau When I was a little boy I

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Chọn phương án đúng nhất để hoàn thành các chỗ trống trong bài viết sau
When I was a little boy I lived in a village in the country. The village was not a large one, ___(41)___ many interesting people lived there. The man I liked best was Mr. Obi. He was the only teacher in my village. His school was small. It ___(42)___ only two classrooms. Mr. Obi built a bathroom for himself. He was a very active and ___(43)___in the pupils. He often wore ___(44)___. In the morning he usually stood outside the school building with a piece of chalk in his hand. He was there to wait for his pupils. He always told his pupils to keep clean. He thought that clean boys were healthy boys. And healthy boys worked ___(45)___. This was really an excellent piece of advice. Actually, it was quite a long time ago. Now he is old. He has retired.