This is ______ my parents are worrying about.
---Mr. Wu, can I have a look at the scores?---Well, you are a senior, so I_____ hardly remind you that the scores are not open to students.
Russia’s cutting off the gas supply raised a major concern to the European Union, ______ a number of member states are increasingly dependent on one single supplier.
US Apple decided to expand its business in China in response to an increasing demand ______ digital product.
We are confident that the step the Chinese government has taken to cope with the current crisis is ______ of great significance.
I witnessed the gate of the bank _______ open and many men entering it, but I couldn’t make them out in the darkness.