选择合适的短语并以适当形式补全下面的句子，每个词组只能用一次。(共5分，)
take up   dress up as    on one’s own    in other words  at times     
cut off    come up with   back and forth      be up to
81. The dancers are dressed in beautiful costumes，skipping _______ to the rhythm of loud drums.
82. in winter, the town______ often_______ by snow.
83. —What ______ you_____ this weekend?
—Don’t ask，Tom．I have lots of work to do.
84. ______even the most talented athletes lose their motivation.
85. “I can manage ________. Thanks. ”