单选题 Most good writers use every means at their ______ to make the reader"s way smooth and easy.
【正确答案】 B
【答案解析】[解析] 固定搭配。没有at one"s will的搭配,而是at will“任意,随意”;at one"s disposal“可自行支配”;at one"s request“应某人请求”;at one"s convenience“在某人方便时”。根据句意,只有B项符合题意。