I really wanted to help tom,but I didn't know___to do.A.what

I really wanted to help tom,but I didn't know___to do.A.what i wanted to explain,but he didn't give me any_ A excuse B ch I want to help her but I don't know what I can do to her I really don't know ( ).A.what to do the next B.what to do i I really don't know_____.A.what should I do B.what to do C.w But I didn`t do! I want to help her but don't know what I can do or----- to s he was tired,and he wanted to have a rest,but Tom didn‘t （）T I always wanted to forget you,but I didn t know I could only I really don`t know_____ A.what to do it B.how to do C.what 15.▲ such a difficult problem,I really didn’t know what to d What did you do just now? I wanted to buy a cartoon book but