Chen Gang is a teacher from a university.     1     (he) son, Chen Lihao, is a university student. They reached the top of Mount Qomolangma     2     April 30th, 2022. During their journey, they did scientific research and     3     (collect) many samples (样本) of ice, snow, plants and rocks. They were treated as     4     (hero) after they returned.

Chen Gang is very     5     (interest) in climbing mountains. He met lots of difficulties on n the way,     6     he never thought of giving up. As for Chen Lihao, he is one of the     7     (good) mountain climbers in our country. He always     8     (train) hard and gets ready for more challenges. Both     9     father and son show great courage and abilities. They     10     (close) connect their personal futures with national needs. Their successful climb of Qomolangma has great meaning for the study of the mountain.