Question

At the moment we have too much to do _ (think) of doing anything else.

Answer 1

thinking

这里的thinking是think的ing形式，表示结果状语。

这个句子的意思是：

此刻我们要做的事情太多了，（所以）我们没空想别的事。

Answer 2

to think 目的状语
很高兴为你解答！
老师祝你学习进步！
望采纳，多谢你的问题！^_^

Answer 3

这题的题点在于too much to do to think 有两个to; 其实第二个to 才组成too……to……（太……而不能……）结构。
At the moment we have too much to do to think of doing anything else.
眼下我们忙得不可开交，心无旁骛。

供参考