mary gave the textbook to all the pupils except______who had already taken them
A)the ones
b)ones
C)some
D)the others
请说明选择的原因,为什么不能选其他答案
2)why_______?it's necessary.
A)you not do it
B)you do it
C)to do it
D)not do it
请说明选择的原因,为什么不能选其他答案