---Who is making so much noise in the garden?--- No,__ the children.
A. It is
B. They are
C. That is
D. There are
It was ___ she was about to go out ____ the telephone rang.
A. when ; that
B. so; that
C. before; then
D. when; before
____ that silver is not widely used as a conductor?
A. Why is
B. Is it why
C. Why is it
D. Why is that
---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