want to be — 英语填空题
题目
根据句意及首字母提示补全单词，完成对话。
A: What do you want to b___ when you grow up?
B: I want to be an e___ (工程师). I'm going to study math really hard.
A: How are you going to do that? And what does your sister want to be?
B: She w___ to be a p___ (飞行员). She is going to take flying lessons.