I’m not sure _____there are living things on other planets or not.—_______.

The long speech given by that old professorseemed _____ and endless. He felt so _____ that he nearly fell asleep.

26. Do you want to go to BeijingShanghai

The boss of the company is as _____ as a young man and hates sitting around doing nothing at all. [ ]

I remember that ＿＿＿＿ an old church on the top of the hill many years ago.