Do you know _______ he is from Hainan or not?A. that B. whether C. if
Every time ________ they met, they would talk several hours together about the persons and things ________ they remembered in the middle school.
Unless you change your ________ towards your studies, you won’t make any progress, I believe.
He has given me so much help that I really wanted to do something for him ________.
Mr. Li is absent today. What do you consider ________ to him?
The reason ________ he refused to attend the meeting was that they didn’t give him an invitation earlier.