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。