It's foolish to go to the ___ of taking music lessons if you never practise.
| A．expense | B．sense | C．pay | D．money |
It was in the small house ___was built with stones by his father ___ he spent his childhood.
A. which; that B, that ;where C, which; which D. that; which
I can’t find Mr. Smith .Where did you meet him this morning?
It was in the hotel ___ he stated.
A. that B which C. the one D. where
____ 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; before |