Ifyou_______inbehavinginthiswayyouwillbringyourselfnothingbuttrouble.
B
continue 一般不与 in 搭配，常见的是 continue to do sth 。decide 也多与 to 搭配。另一方面，从词义来看，continue 意思是 “继续”，decide 意思是“决定”，react 意思是 “反应， 作出反应”，都与句意不相符。 只有 persist 无论是从搭配还是从意思来看都是最佳答案。
Iwasreallyanxiousaboutyou.You______homewithoutaword.
Itmakesgood________tobringanumbrella;itseemstoberainingtoday.
Havingdecidedtorentaflat,we________contactinghousingagenciesinthecity.