题目：
The earth is 49 times ___the moon. A．as bigger asB．so big asC．the size ofD．of the size of
答案
C
解析
倍数有三种表达法：⑴A is three times bigger than B⑵A is three times the size of B⑶A is three times as big as B。这符合第二种。 考点名称：there be句型 there be句型的概念： 英语中的there be结构主要表示某处存在有某物，所以通常被称为存在句。其中的there为引导词，无词义，be为谓语动词，therebe后面的名词为句子主语。 therebe结构的否定式和疑问式： 1、否定式： there be结构的否定式通常应将否定词置于动词be之后： 如：There is not any bread left. 没有一点面包了。 There isn't anything I can do for you. 我帮不了你什么忙。 若谓语中包括有助动词或情态动词，通常将否定词置于助动词与情态动词之后： 如：There can't be so many mistakes. 不可能有那么多错误。 There shouldn't be any doubt about it. 对此不应有什么怀疑。 There haven't been any parties in weeks. 好几个礼拜没开过晚会了。 另外注意以下类型的否定式： 如：There doesn't seem to have been any difficulty over the money question. 在钱的问题上似乎没发生什么困难。