# 单词拆分 II
<p>给定一个<strong>非空</strong>字符串 <em>s</em> 和一个包含<strong>非空</strong>单词列表的字典 <em>wordDict</em>，在字符串中增加空格来构建一个句子，使得句子中所有的单词都在词典中。返回所有这些可能的句子。</p>

<p><strong>说明：</strong></p>

<ul>
	<li>分隔时可以重复使用字典中的单词。</li>
	<li>你可以假设字典中没有重复的单词。</li>
</ul>

<p><strong>示例 1：</strong></p>

<pre><strong>输入:
</strong>s = &quot;<code>catsanddog</code>&quot;
wordDict = <code>[&quot;cat&quot;, &quot;cats&quot;, &quot;and&quot;, &quot;sand&quot;, &quot;dog&quot;]</code>
<strong>输出:
</strong><code>[
&nbsp; &quot;cats and dog&quot;,
&nbsp; &quot;cat sand dog&quot;
]</code>
</pre>

<p><strong>示例 2：</strong></p>

<pre><strong>输入:
</strong>s = &quot;pineapplepenapple&quot;
wordDict = [&quot;apple&quot;, &quot;pen&quot;, &quot;applepen&quot;, &quot;pine&quot;, &quot;pineapple&quot;]
<strong>输出:
</strong>[
&nbsp; &quot;pine apple pen apple&quot;,
&nbsp; &quot;pineapple pen apple&quot;,
&nbsp; &quot;pine applepen apple&quot;
]
<strong>解释:</strong> 注意你可以重复使用字典中的单词。
</pre>

<p><strong>示例&nbsp;3：</strong></p>

<pre><strong>输入:
</strong>s = &quot;catsandog&quot;
wordDict = [&quot;cats&quot;, &quot;dog&quot;, &quot;sand&quot;, &quot;and&quot;, &quot;cat&quot;]
<strong>输出:
</strong>[]
</pre>

<p>以下错误的选项是？</p>
## aop
### before
```cpp

```
### after
```cpp

```

## 答案
```cpp

```
## 选项

### A
```cpp

```

### B
```cpp

```

### C
```cpp

```
