Lucy asked for a separate room so that she could avoid ______ with Tom alone.
I don't think you can work out the maths problem ____ the teacher's help.
My uncle lives ____ 105 Huanghe Street. His room is ____ the fifth floor.
Mr Wang went to Nanjing ____ October,1998 and came back home ____ the morning of Nov.5.
My father was disappointed ____ the news.
His teacher was angry ____ him ____ his being late.