7. My mother (have) a shower. She ( not cook).

7. My mother (have) a shower. She (not cook).

В данном предложении необходимо использовать Present Continuous для описания действий, происходящих в данный момент.

My mother (have) a shower -> My mother is having a shower.

She (not cook) -> She is not cooking (She isn't cooking).

Составим предложение:

My mother is having a shower. She isn't cooking.

Ответ: My mother is having a shower. She isn't cooking.