1、So far no one has been able to account for the cause of the accident. 【单选题】A.assessB.explainC.describeD.investigate正确答案:B答案解析:investigate:
小编每天为您准备了5道每日一练题目（附答案解析），1、We＇ve been through some rough times together.【单选题】A.shortB.difficultC.longD.happy正确答案:B答案解析:rough和四个选项中的difficult的意思相近。
play:the star＇s waistline seems to have a little extra padding. Another Spanish sports daily published similar before-and-aider photos and argued that the star has "worn out"
分为单选题和多选题和判断题和计算题和简答题和不定项。小编每天为您准备了5道每日一练题目（附答案解析）。
because doing so would crash the systems."
causing the flu-like symptoms .The virus also causes bleeding and impairs the bodys normal clotting mechanism(凝血机制)。
文章后面有6组文字，请根据文章的内容选择5组文字，将其分别放回文章原有位置。
(1)第23——26题要求从所给的6个选项中为第2——5段的每段选择l个最佳标题;(2)第27——30题要求从所给的6个选项中为每个句子确定1个最佳选项。
