A. superior B. superficial C. superfluous D. supernatural
A. principal B. principle C. principled D. prior
A. spam B. spams C. span D. spans
A. counter B. count C. counterattack D. counterpart
A. worse B. deteriorate C. detect D. adverse
A. worsen B. mute C. reduce D. deteriorated
A. impurity B. impurities C. impure D. impures
A. byproduct B. product C. result D. outcome
A. concentration B. concentrations C. percent D. contain
A. respectable B. respectful C. respective D. respected