With __thorough___of its culture and custom in a foreign country ,you could easily
问题描述：
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
望给详解
答
A a knowledge of sth 固定搭配 “对……有了解”
“彻底了解外国文化和习俗后,你能轻松与他们相处”