________ is known to us a11 is that the Diaoyu islands have been part of our Chinese territory since ancient times.

I am sorry I _______ my exercise book at home.— Don’t forget _______ it to school tomorrow.

I would have helped you, but I ________ really occupied the whole week．

I can never think clearly enough to my time properly. [ ]

_________ do you go to school every day —By bus.