I can never forget the day _______ we worked together and the day ______ we spent together.
---Is that the small town you often talk about? ---Right, just the one ______________ you know I used to work for three years.
Although the first part of the book is easy, the rest ______.
----Where are you now? ----Well, I have arrived at _______ is called “the West lake”.
If you want to improve your oral English, you’ll first have to _______yourself of those shortcomings.
It was ________ he came back from Africa that year _________ he met the girl he would like to marry.