题目内容：

6、 Erica ( ) made all the necessary arrangements to make sure nothing would go wrong.
A:careful B:carelessly C:carefully D:caution

优质解答

c Erica做着所有必要的准备工作,以备万无一失.
空格后边是动词,所以这里要添一个副词,排除a d
然后根据意思应该是肯定,排除b