Optimism and pessimism are both powerful forces, and each of us must choose which we want

A£®Man will probably be able to live there in 200 years.

B£®Scientists are rather pessimistic about it.

C£®Man will probably be able to live there in 100,000 years' time.

D£®Scientists are optimistic about overcoming the difficulties soon.

A£®Man will probably be able to live there in 200 years.

B£®Scientists are rather pessimistic about it.

C£®Man will probably be able to live there in 100,000 years' time.

D£®Scientists are optimistic about overcoming the difficulties soon.

A£®Man will probably be able to live there in 200 years.

B£®Scientists are rather pessimistic about it.

C£®Man will probably be able to live there in 100,000 years' time.

D£®Scientists are optimistic about overcoming the difficulties soon.

A£®Man will probably be able to live there in 200 years.

B£®Scientists are rather pessimistic about it.

C£®Man will probably be able to live there in 100,000 years' time.

D£®Scientists are optimistic about overcoming the difficulties soon.

A£®Man will probably be able to live there in 200 years.

B£®Scientists are rather pessimistic about it.

C£®Man will probably be able to live there in 100,000 years' time.

D£®Scientists are optimistic about overcoming the difficulties soon.

A£®Man will probably be able to live there in 200 years.

B£®Scientists are rather pessimistic about it.

C£®Man will probably be able to live there in 100,000 years'time.

D£®Scientists are optimistic about overcoming the difficulties soon.

A.optimism

B.shame

C.rrogance

D.indifference

E.laziness

A.Cynicism

B.Optimism

C.Cheerfulness

D.Joviality

A.Ñ¡Ôñ

B.ÀÖ¹Û£»ÀÖ¹ÛÖ÷Òå

C.Ïà·´

A.Optimism

B.Symbolism

C.Simplicity

D.Black Humor

A.optimism

B.mature

C.pessimism

D.irritation