--- Where did you meet him for the first time? --- Maybe it is in the museum ______ we listened to the lecture ______ we got to know each other.
It makes no difference __________.
They don’t know _______ their parents are.
I am sure _______ you said is true.
The old man told us _______ and ________.
---Do you know when the World Cup ________ next week? --- Next Friday. When it ________, I will ring you.