问题：
If you don’t understand ________, you can raise your hand to ask．
A.what your teacher say
B.what does your teacher say
C.what your teacher tells
D.what your teacher says
If you don’t understand ________, you can raise your hand to ask．
A.what your teacher say
B.what does your teacher say
C.what your teacher tells
D.what your teacher says
A.what your teacher say
B.what does your teacher say
C.what your teacher tells
D.what your teacher says
参考答案：