The global warming is a big problem from our planet. If global warming developed, it will have negative consequences. Such consequences are rising temperatures, climate change, melting glaciers, the greenhouse effect. This is due to the fact that people pollute the air with their plants and factories. Not only the climate suffers from this, but also people and animals, because they breathe this air. in order to combat this problem we need to plant more forests and not cut down trees that are the lungs of our planet. I think Global warming is one of the biggest mistakes man has made. That is a reason why we must correct it. So Global warming for me is a the first problem that we must correct.
1. Mary asked, "What date is the concert?"
Mary asked what date the concert was.
2."Do you like Mozart?" I asked Mary.
I asked Mary if she liked Mozart?
3."Did you play computer games yesterday?" mum asked us.
Mum asked us if we had played computer games the day before.
4."Have you already cleaned your teeth?" mum asked John.
Mum asked John if he had already cleaned his teeth.
5."Where are you going now?" Lena asked Bobby.
Lena asked Bobby where he was going then.
6."Who broke the vase?" asked mum.
Mum asked who had broken the vase.
7."Are we happy?" Susan asked me.
Susan asked me if we were happy.
8."Will we go for a walk tonight?" I asked my friend.
I asked my friend if we would go for a walk that night.
Время Present Perfekt, пассивный залог (Passive Voice).
В предложении присутствует "has been", что характерно для времени Present Perfekt Continuous, но так же здесь присутствует глагол в третьей форме - expelled, чего во времени Present Perfekt Continuous быть не может. Вспоминаем, где ещё употребляется форма "has been" - она употребляется ещё только во времени Present Perfekt, в пассивном залоге. И в пассивном залоге как раз должен быть глагол в третьей форме.