I'm not sure ________.
A.which floor does he live
B.which floor does he live in
C.Which floor he lives on
D.which floor he live

Do you remember _______?
A.what did he tell us
B.what does he tell us
C.he told us what
D.what he told us

I'm not sure _________.
A.how many cousins does she has
B.how many cousins does she have
C.how many cousins she has
D.she has how many cousins

Could you tell me _______ the bike withou any help this morning?
A.how does he mend
B.how he mends
C.how he mended
D.how did he mend

Could you tell me ________?
A.which room he lives
B.which room he lived
C.which room he lives in
D.which room did he live in

 

老师可以告诉我这些宾语从句什么时候用do，什么时候不用do吗？