Well over (three-fourths) of that book (on) noted British writers (are) about authors who wrote during (the nineteenth) century.

单项选择题(The above) is the most important aspect (which) apes (can be told) from more (primitive) social groupings.

单项选择题Acids constitute a family of (chemical compounds) that, (in) (solution), have the ability to turn certain blue vegetable dyes red, a corrosive action on metals, and (taste sharp).