题目

I want to know your age. A . How are you? B . How old are you? C . What's your name? D . When is your birthday? 答案：BSome students are so that they often make mistakes in their homework.A. careful B. careless C. serious D. carefully B 【解析】句意：一些学生如此粗心以至于他们经常在作业中出错。A. careful仔细的；B. careless 粗心的；C. serious严肃的；D. carefully仔细地。结合题意可知，一些学生经常犯错误，可以判断他们是粗心的，故答案为B。