Задать вопросы Put the questions to the following sentences beginning withhow long.
1. Mike has been writing his translation for an hour.
2. My sister has been learning Italian since she was five
3. We've been waiting for him for two hours
4. They've been talking for an hour.
5. She has been playing the piano for two hours.
6. I've been looking for this dictionary for three months.
7. The students have been discussing this problem since 2 o'clock.
8. They have been developing my pictures since Monday.
