You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allpages gapcontinue="英単語の接尾辞で品詞を見分ける方法" />
  </query-continue>
  <query>
    <pages>
      <page pageid="12" ns="0" title="TOEIC リーディングセクションの時間配分" contentmodel="wikitext" pagelanguage="ja" touched="2015-08-22T10:20:27Z" lastrevid="34" counter="" length="5615" new="" />
      <page pageid="11" ns="0" title="スピード、スケールや程度を表す形容詞" contentmodel="wikitext" pagelanguage="ja" touched="2015-08-16T15:55:55Z" lastrevid="29" counter="" length="1026" new="" />
      <page pageid="9" ns="0" title="プレゼンテーションの図を説明するためのフレーズ" contentmodel="wikitext" pagelanguage="ja" touched="2015-12-20T03:08:34Z" lastrevid="41" counter="" length="5366" />
      <page pageid="2" ns="0" title="メインページ" contentmodel="wikitext" pagelanguage="ja" touched="2017-01-22T01:23:34Z" lastrevid="49" counter="" length="724" />
    </pages>
  </query>
</api>