Помогите пожалуйста. Вставьте there is, there are, there was или there were. ............... a cake on the table. You can eat it. ............... a cake on the table. Where is it now? ................ ten chairs in the room, but Ann took two chairs, and now ................. eight chairs. ................ two sweets in my bag. Who took them?

There is a cake on the table. You can eat it.
There was a cake on the table. Where is it now?
There were ten chairs in the room, but Ann took two chairs, and now there are eight chairs.
There were two sweets in my bag. Who took them?