His ability is beyond question; _____ has been in doubt is ____ he is prepared to work hard
They talked about the persons and things ______ they remembered at school.
His English teacher is a young girl, ____ left college only last year.
This is the factory ______ I visited last week.
—Jack, could I use your laptop for a while? —___________. Go ahead, please.
I paid a fine of 200yuan for speeding. If only I _________ the traffic rules!