Some audience(观众)_______that it usually takes too long to watch the ads during the TV series .
The number of the people in the room_______sixty, but a number of them_________students.
What did he say? I don’t know what________.
I told your friend how to get to the hotel, but perhaps I______have driven her here.
I’m sorry to have hurt you, but I didn’t do it________.
It is the first time that I_______to Beijing.