Try not to buy too many things from abroad it may cost a lot of money to bring them back.

问题补充：

Try not to buy too many things from abroad it may cost a lot of money to bring them back.

A. because

B. so

C. so that

D. Although

答案：

(答案→)A. because

B. so

C. so that

D. Although

解析：句意：尽量不要从国外买太多的东西，因为把他们带回来将会花掉你很多钱。A因为，B所以；C为了；D尽管；结合题意选A,表原因。