A. Amoeba

B. Language

C. Nature

D. Society

A. annoyed : disillusioned

B. disturbed : interrupted

C. covetous : rapacious

D. outmoded : ostentatious

E. tranquil : placid

A. Moraines

B. Tributaries

C. Deltas

D. Mountains

A. Flaw : Perfection

B. Careless : Mistake

C. Truth : Lie

D. Fear : Joy

A. Uranium

B. Radium

C. Radioactivity

D. Photography

A. vindictive : revenge

B. scholarly : library

C. immaculate : cleanliness

D. thirsty : water

E. belligerent : invasion

A. Rust

B. Ash

C. Raven

D. Blush

A. Book : Knowledge

B. Sword : Blade

C. Radio : Transistor

D. Nut : Bolt