1. (2020八上·乾安期末) 根据对话内容。在空白处填上适当的话（词、短语、句子）。

A: What do you want to be when you up?

B: I want to be  engineer.

A: ?

B: Because I think it is interesting.

A: But it will be difficult. ?

B: Er… I'm going to computer classes in all my free time.