【单选题】
There are some navigational instruments()the bridge.
A、in
B、on
C、at
D、of
A、in
B、on
C、at
D、of
A、A. There are some saws in my toolbox. B、B. There are some pairs of pliers in my toolbox. C、C. There are some spanners in my toolbox. D、D. There are some tools in my toolbox.