問題詳情：
Many businesses started up by college students have _________ thanks to the comfortable climate for business creation.
en off n off ed off off
【回答】
B
【解析】試題分析：考查動詞短語辨析。fall off跌落，下降；take off起飛，成功，受歡迎；turn off關閉；leave off停止，中斷；根據句意可知B項正確。
考點：考查動詞短語辨析
知識點：詞組 短語
題型：選擇題
