Question

I will spend no more minutes__（wait）for you at

I will spend no more minutes__（wait）for you atthe school gate

Answer 1

应该是：
I will spend no more minutes（waiting）for you at the school gate.
答案填：waiting
固定搭配：spend time/money (in) doing sth

Answer 2

wait for是常用句型,意为“如果……又该如何?”
我将不再在学校门口等你。