问题的英文单词怎么拼写

她对环境问题深感担忧。

She cares deeply about environmental issues.

我们刚到，问题就来了。

Hardly had we arrived than the problems started.

移民问题不在争论之列。

The problems of immigration were not the question at issue.

我经常思考这个问题。

I have often thought about this problem.