A．They are seldom used in poems.
B．They can make a poem blunt.
C．They are needed in a poem.
D．They are mostly used to express feelings.
A．Waste products that can be prevented or disposed of sensibly.
B．Artificial and natural substances released into the environment.
C．Advertising that persuades people into buying products.
D．Nuclear power stations that cause ecological imbalance.
A．The farmers stop using any fertilizer.
B．The farmers stop using the farmland too heavily.
C．The farmers stop using farming machines.
D．The farmers stop growing with new methods.