根据句意和首字母的提示，写出单词。

1. They are doing some r _______ into the effects of brain damage.

2. We will have to clear some s ______ to make room for the new sofa.

3. The report describes things as they r _______ are. .

4. Many social servers are still provided by v _______ societies.

5. Look! He's got a hearing aid—he's d ________.

下列哪项仲裁协议有效

A．限制民事行为能力人订立的仲裁协议
B．甲、乙达成将合同纠纷提交重庆市仲裁委员会仲裁的仲裁协议，但是甲提出证据证明其确实是因被乙胁迫而订立的
C．甲、乙双方约定，将争议提交仲裁机构仲裁，如对仲裁裁决不服的，可向人民法院起诉
D．甲、乙双方对仲裁委员会没有约定，在发生纠纷后，自愿达成了补充协议