._____________ he used to go skiing in winter but now swimming is his favorite.
| A．At a time | B．At one time | C．At no time | D．At times |
____ that silver is not widely used as a conductor?
| A．Why is | B．Is it why | C．Why is it | D．Why is that |
It was ___ he said ___ disappointed me.
| A．what; that | B．that; what | C．that; when | D．it; when |
It was ___she was about to go out ___the telephone rang.
| A．when ; that | B．so; that | C．before; then | D．when; before4. |
---Who is making so much noise in the garden? --- ___ the children.
| A．It is | B．They are | C．That is | D．There are |
Were all three people in the car injured in the accident? No,___ only the two passengers who got hurt.
| A．it was | B．there is | C．it were | D．there was |