核心问题
（1）——Mum, why do you always make me eat an egg every day? —— enough protein and nutrition as you are growing up. A. Get B. Getting C. To get D. To be getting(上海高考,99-18)
(2)——What do you think made Mary so upset? — her new bicycle. A. As she lost B. Lost C. Losing D. Because of losing(同上,97-13)
我不明白为什么试题(1)的答案是 C, 而不是 B, 试题(2)的答案是 C, 而不是 B。
词典解答
动词不定式的一个很主要的用法,就是作目的状语。试题(1)中的 To get enough...正好可以回答 Why? 的问题。而动名词 Getting 却不能用作目的状语,不能回答 why? 的问题。而在试题(2)中要求对主语进行回答,只有动名词 Losing 才能“胜此重任”。