Well, I’ll consider (solve)（）the problem, then I will tell you the way by phone.

A．To have to work to survive.
B．To lace a hard decision.
C．To stay home.
D．To look after a young child or several children.

A．the first synthetic rubber was produced by Charles Goodyear
B．if it had not been for a traffic accident, we would not have had synthetic rubber
C．more need for rubber helped the development of synthetic rubber
D．the first synthetic rubber came into being totally unexpectedly