以下组合中，均为必需氨基酸的是（）。A．苏氨酸、色氨酸、赖氨酸、胱氨酸 B．蛋氨酸、
题型：单项选择题
问题：
以下组合中，均为必需氨基酸的是（）。
A．苏氨酸、色氨酸、赖氨酸、胱氨酸
B．蛋氨酸、苯丙氨酸、色氨酸、酪氨酸
C．缬氨酸、色氨酸、酪氨酸、赖氨酸
D．亮氨酸、异亮氨酸、组氨酸、甘氨酸
E．赖氨酸、亮氨酸、苏氨酸、苯丙氨酸
题型：单项选择题
阅读下面的短文，并借助上下文和插图补充所缺信息。每个空只能填写一个形式正确、意
义相符的单词。
Marsha is the English teacher of Class 1. She is kind and likes to tell stories in her class, so all the 小题1: ＿＿＿＿like to be with her. Last week, two students didn't finish their homework. That 小题2:_______ Marsha a little angry. She 小题3:_______the two students to stay in the classroom after school. When school was over, all the students went 小题4:________except (除…以外) the two students. Marsha asked them to 小题5:______ the homework first. The two students 小题6:________ as she asked. After they finished their homework, Marsha told them a 小题7:_______about her classmate, Tony. Tony was lazy when he was a student. He didn't do his小题8:_______ every day. When he graduated (毕业) from high school, he wanted to find a job. But he couldn' t find a good 小题9:________. At that moment, he regretted (后悔) what he had done. After 小题10:_________ to the story, the two students felt sorry. They told Marsha they would finish homework on time and they would study hard.