问题补充:
---What do you want to be when you ?
-----An astronaut.
A. take up
B. come up
C. grow up
D. get up
答案:
A. take up
B. come up
(答案→)C. grow up
D. get up
解析:根据题干,本句的意思是:---当你长大后,想成干什么?---宇航员。take up“占据”“从事”,come up“发生”,grow up“长大”,get up“起床”。根据题意,应用grow up。所以本题选C。