——Do you know the answers to these questions asked by your little brother?——Of course not, but I can’t let him know .
—What's the matter with Della? —Well,her parents wouldn't allow her to go to the party,but she still ________.
—Would you like to join me for a quick lunch before class? —________,but I promised Nancy to go out with her.
In my opinion,life in the twenty-first century is much easier than ________.
When I handed the report to John,he said that George was the person ________.
It is said in Australia there is more land than the government knows ________.