The number 9.11 is a special number, ____, I think, that will be remembered by the Americans forever.
____ finishing his homework, he went to play basketball.
He tried to invite some famous pop stars to sing in the concert ______, but failed.
_____ we have finished the course, we shall start doing more revision work.
I don’t like the way ________ Mr. Wang treats his children.
I meant to help him . ______, he didn’t accept my offer.