Miss Zhao is very helpful. She often helps us ____we are in trouble.
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。
Miss Zhao is very helpful. She often helps us ____we are in trouble.
He was so tired that he fell asleep ___he went to bed.
—Which book do you prefer, Harry Potter or Treasure Island?
—Harry Potter, of course, ____I ___ my sister likes it.
Millie’s research paper isn’t up to standard______ she has worked at it for two weeks.
—Don't forget to protect your eyes well______ you take online classes.
—OK. Thank you, Sir.
_____ the outbreak of COVID-19 is a terrible blow to the country, the government is trying hard to bring the situation under control.
_______ you have problems, just let me know. I'll always be there for you.
We should protect the environment _______ we can make a better world to live in.
____ she is very young, she can take good care of herself.
________ Simon has done well in his studies, he still works really hard.
