After supper she would sit down by the fire, sometimes for ______ an hour, thinking of her young and happy days．

A.as long as

B.as soon as

C.as much as

D.as many as

答案及解析： A

as long as意为“长达……”；as soon as意为“快到……”；as much as和as many as表示“多达……”。该句谓语为延续性动词sit，用as long as表示“坐了一个多小时”。