用所给词的适当形式填空
I suggest_________ (ignore) this problem because it’s unimportant.
Every possible means should_________ (make) use of to study our subjects.
The frequent collapse of rocks can_________ (relate) to human activities in this area.
In_________ (add) to English, he has to study a second foreign language.
George was_________ (freeze) with the shocking news that his apartment had just been burnt.