This is b____they are too carefully in their studies.

热心网友

because?

热心网友

应该是because我觉得是正确答案是什么？

热心网友

啥东东啊.....现在还考单词拼写啊..?

热心网友

because吧.不过题目好像有问题:they are too carefully?应该是too careful吧 be careful才对啊

热心网友

boring