单选题 It takes Earth about 365 days ______ one orbit around the sun.
A. to complete B. complete
C. completing D. being completed

【正确答案】 A
【答案解析】[解析] “it+take+sb.+时间+to do sth.”意为“做某事花去某人多少时间”。it是形式主语，真正主语是to do sth.，应该用不定式来表示。