______ takes a lot of concentration and a great sense of balance to stay on it.
Jim passed the driving test,________ surprised everybody in the office.
I want to use the same dictionary ________ was used yesterday.
After living in Pairs for fifty years he returned to the small town ________ he grew up as a child.
________ is known to everybody,the moon travels around the earth once every month.
—So you have met Maria? —Yes,it was last week ________ we attended Jack’s party.