David didn't give up (）he had failed in the experiment four times.Aif Bwhile Cthough DsinceMr.zhao is very helpful.He often helps us () we are in trouble.A.whether B.although C.whenever D.however急,说明理由

David didn't give up (）he had failed in the experiment four times.Aif Bwhile Cthough DsinceMr.zhao is very helpful.He often helps us () we are in trouble.A.whether B.although C.whenever D.however急,说明理由
David didn't give up (）he had failed in the experiment four times.Aif Bwhile Cthough Dsince
Mr.zhao is very helpful.He often helps us () we are in trouble.
A.whether B.although C.whenever D.however
急,说明理由

David didn't give up (）he had failed in the experiment four times.Aif Bwhile Cthough DsinceMr.zhao is very helpful.He often helps us () we are in trouble.A.whether B.although C.whenever D.however急,说明理由
你好,同学

正确答案：

1. 选C. though 尽管

翻译：尽管大卫做实验失败了四次,但是他没有放弃.

解析：though 是尽管的意思,引导让步状语从句,其它选项与题意不符.

2. 选C. whenever 无论何时

翻译：赵老师非常乐于助人,不管什么时候我们遇到困难,他都经常帮助我们.

解析：whenever 是无论何时,不管什么时候的意思.


希望能帮到你,祝更上一层楼O(∩_∩)O
有不明白的请继续追问,可以详谈嘛(*^__^*)

1、C though 虽然
2、C whenever 任何时候

c。大卫还没有放弃（尽管）他已经失败了四次

如果是我我会选 C
翻译进去的话就是 无论我们什么时候遇到困难他都会帮助我们。