学进去

Once upon a time, there ______ a boy named Lu Ban. He loved wood and he wanted to be a very good carpenter (木匠). He needed to ______ a good teacher. He walked for a long time and climbed over a very high mountain with no roads. He was very tired, ______ he didn’t stop. At last, he found a very good teacher. He stayed with his teacher ______ three years. Lu Ban did ______ the teacher said. Then he became a great carpenter. He is still famous all over China now.