读下“欧洲西部示意图”，回答下列各题。
按要求改写句子。
40÷20＝____
600÷2＝____
120÷4＝____
91÷7＝____
如图，阴影部分表示的集合是（ ）
A (n) is a group of words whose meaning is different from the meaning of each word understood on its own.
