I THINK HIS PREFERENCE _______ SPEAKING HIS NATIVE LANGUAGE IS NAT...

90. - BAI LUYEN TAP VE DANG DANH TU DI VOI GIOI TU HAY CO DAP AN A1562
BAI LUYEN TAP VE DANG DANH TU DI VOI GIOI TU HAY CO DAP AN A1562

90. I think his preference _______ speaking his native language is natural.

A. for B. on C. for D. in