Having lived in China for 8 years, Helen has a good ______ of both English and Chinese.
It’s said that __________ is going to give us a lecture.
We had ___________ wonderful time_________the party_______ other day.
I don't remember___________ to the airport that year.
A man does not know the difficulty of anything_________ he does it personally.
There is a _________ of 1000 dollars for the return