Be _____ guard against pickpockets.A: onB: byC: withD: of

A high temperature alarm or _____ which will melt is used to guard against the explosion of compressor air pipelines.

The snakes will attack only if you take it ______ surprise.A．inB．byC．withD．on

Some important music companies used laws to guard against______.A．illegal revising of tune

Nobody is immune ________ taxation.A: fromB: byC: out ofD: against

Their thoughts seem to be ___ the more sober kind.A: inB: toC: withD: of

Women were thought to be______to men because of the prejudice against them.A．superiorB．inf