Подставьте must, can’t, should, may, might или could и глагол в соответствующей форме НАДО

Every morning I take a shower. I brush my teeth 2 times a day, morning and evening. This is very important for my health.Sport activities helps me to be strong and healthy.During the winter I go skiing and skating. I spend much time outdoors
Such time spending allows me to not to be ill in winter. It brings a lot of joy and fun. We have a great time with my friends. Every summer we spend 2 weeks with my parents at the sea. We swim in the sea. Eat fresh fruit and tasty food. It is my favorite habit.

1. Does my working day last 8 hours?

Does my working day last 8 or 9 hours?

How many hours does my working day last?

2. Did they discuss a lot of articles on economics yesterday?

Did the discuss a lot of articles of economics or politics yesterday?

What articles did they discuss yesterday?

3. Will I do the work in 2 days?

Will I do the work into 2 or 4 days?

When will I do the work?

4.Are they writing a test now?

Are they writing test or an article now?

What are they doing now?

5. Has he been to the USA lately?

Has he been to the USA or Singapore lately?

Where has he been lately?