请选择ABCD*Y6n-v+w*f,Q)G9T We should keep on _____ English every day.:b2N0g1R.j'q,h5S:N
A. to practice to speak:b2N0g1R.j'q,h5S:N
B. to practice speaking:b2N0g1R.j'q,h5S:N
C. practicing to speak:b2N0g1R.j'q,h5S:N
D. practicing speaking:b2N0g1R.j'q,h5S:N