With      thorough      of its culture and custom in a foreign country, you could easily get along with others.

       A．a; knowledge                                       B．/; understanding

       C．a; comprehension                                 D．/; concept

With      thorough      of its culture and custom in a foreign country, you could easily get along with others.

A．a; knowledge                                        B．/; understanding

C．a; comprehension                        D．/; concept