问题
选择题
－ Take one more pen. If your pen doesn’t work during the exam, you can use the other one.
－ OK, Mum. You are always_______.
A．grateful
B．useful
C．thoughtful
D．wonderful
答案
答案：C
考试多带一些钢笔应该是体现母亲的考虑周到，thoughtful表示此意，故本题选C。