The more one is ______ the English-speaking environment, the better he or she will learn the language.
We have to delay the party till next week, ____ we will not have something important to do. A. whenB. which C. at which D that
I don’t like such a person ____ often lies before your face.
By using ears one can tell the direction ____ a sound comes.
I don’t believe the reason ____ he has given for not coming to the lecture.
In the forest we observed some trees ____the leaves were black with disease.