12. Rewrite each sentence, using a preposition at the beginning of a relative clause.
Model: I cannot agree with this idea. ->This is an idea with which I cannot agree.
a. All the citizens believe in this plan.
b. My colleagues are strongly opposed to that suggestion.
c. No one cares about these people.
d. The authorities are currently dealing with that problem.
e. We went to the cinema with a boy, Tony.