Miss Zhao is very helpful. She often helps us we are in trouble.A. whetherB. althoughC. wh

问题补充：

Miss Zhao is very helpful. She often helps us we are in trouble.

A. whether

B. although

C. whenever

D. however

答案：

A. whether

B. although

(答案→)C. whenever

D. however

解析：考查时间状语从句。句意“赵老师非常乐于助人。无论什么时候我们有麻烦，她经常帮我们。”A“是否”；B“尽管”；C“无论何时”；D“无论怎样；然而”。故选C。