公文是历史的记录，是时代的凭证。这句话体现出公文的哪一项作用？（）
A.备考作用
B.指导作用
C.交流作用
D.宣传作用
参考答案：A
张之洞《书目答问》的成功表现在哪些方面？
The residents,()had been damaged by the flood, were given help by the Red Cross.
A. all their homes
B. all whose homes
C. all of whose homes
D. all of their homes
