问题
选择题
Be ___________. Make sure not to make the same spelling mistake next time.
A．peaceful
B．careful
C．helpful
D．thankful
答案
答案：B
题目分析：句意：要认真，确信下次不要犯相同的错误。A. peaceful和平的B. careful认真的C. helpful有帮助的D. thankful 感激的。根据句意，故选B。