补全单词,速求!Please listen to the speaker c____ .I think his report is very good.

问题描述:

补全单词,速求!Please listen to the speaker c____ .I think his report is very good.
Please listen to the speaker c____ . I think his report is very good.
Please be s_____ for a minute. This is very important.
The back s_____ of the car is wide(宽的) enough for three people.
最好能说明为什么填这个.O(∩_∩)O谢谢

保证准确率!
 
carefully 仔细地
请仔细听这位演讲者的发言.我认为他的报告很棒.
serious 认真的,严肃的
请保持严肃一分钟.这个很重要.
seat 座位
这辆车的后座宽的足以坐下3个人.
没有什么原因,句子意思翻译到位即可填出答案.