A.prone
B.disposed
C.infectious
D.accessible

A.cost
B.payment
C.expense
D.charge
A.exhaustive.., exhausted.., exhausting
B.exhaustive.., exhausting.., exhausted
C.exhausting.., exhausted.., exhaustive
D.exhausted,., exhaustive.., exhausting
A.It was a means of making people happy.
B.It was art for recording the world.
C.It was a device for observing the world impartially.
D.It was an art comparable to painting.