【C17】A．regularB．habitualC．customaryD．popular

【C17】A．freedomB．freeC．somethingD．money

【C17】A．relievedB．delegatedC．approvedD．performed

A．regularB．oftenC．usualD．incidental

One of my______customers was Fred Hasbrook, an electronics salesman.A．regularB．normalC．for

具有怎样结构的甾体激素类药物可用四氮唑比色法测定（)。A C17－a－甲酮基B C17－a－ 醇酮基C C20 －

The author seems to think that "The Dog Translator" is______.A．popular and usefulB．popular