语法与词汇
4.Thanking them for their kindness, he said that the old lady really appreciated______by them .
【正确答案】
D
【答案解析】appreciate+doing是固定搭配。其中的动名词doing部分，不一定是doing本身，而是doing／having done／being done／having been done的四种动名词形式中符合逻辑的一种。根据句意是“感激被拜访”，所以用“being visited”。