I apologize if I _______ you, but I assure you that it was unintentional.
As we all know, _______ mankind has realized the walk in ______ space.
-----I’m afraid I can’t finish the novel you lent me this week. ----___________.
_______ the manager came to Beijing on business, he would visit his old friends there.
We’ll only discuss such problems _______ something to do with our own interests.
In the police station, I saw the man from ______room the thief had stolen the TV set.