Mary..... her homework at the moment A)does B)doingC)is doingD) do

Mary is doing her homework at the moment. — В настоящее время Мария делает домашнее задание.

Is doing is in Present Continuous. We use Present Continuous for action that takes place at the moment. Present Continuous is formed with the help of auxiliary to be. The present forms of to be — I am, you are, he is, she is, we are they are.

We add the suffix – ing to the verb.

I am doing my homework.

Negative is formed with the help of not — auxiliary + not + verb + ing.

Interrogative is formed – to be + subject + verb + ing.