Question 7: No________________ the news was, it could not interest Mai who cared for nothing else but her collection.

No matter how~ Hovvever + adj/ adv + s + V, a clause:no matter what…then….

Eg: No matter how/ However hard you try, you will not succeed. (No matter how hard you try, you won’t succeed.)

=> Answer D (No matter how good the news is, it can’t interest Mai, who doesn’t care about anything other than her collection.)