There is a new problem involved in the popularity of private cars __________ road conditions require __________.
| A．that ... improving | B．which...to be improved |
| C．where ...improving | D．when...improving |
I want to use the same dictionary ________ was used yesterday.
| A．which | B．who |
| C．what | D．as |
After living in Pairs for fifty years he returned to the small town ________ he grew up as a child.
| A．which | B．where |
| C．that | D．when |
________ is known to everybody，the moon travels around the earth once every month.
| A．It | B．As |
| C．That | D．What |
—So you have met Maria?
—Yes，it was last week ________ we attended Jack’s party.
| A．that | B．there |
| C．which | D．when |
I was given three books on cooking，the first ________ I really enjoyed.
| A．of that | B．of which |
| C．that | D．which |