【单选题】
()your mother()some cleaning on Sundays?
A、Does;does
B、Do;does
C、Does;do
A、Does;does
B、Do;does
C、Does;do
A、A.They cannot pronounce/n/ B、B.Interlangue interference because there is notthe sound /n/in their mother tongue C、C.The teachers do not have a good teaching method D、D.They do not like to pronounce nasal sounds