In the past five years, the infrastructure construction is booming. Major progress has been made in Inter-regional and intercontinental ______. （ ） A.confilicts B.transport networks C.trade D.harmonious development

In the past five years, the infrastructure construction is booming. Major progress has been made in Inter-regional and intercontinental ______. （ ） A.confilicts B.transport networks C.trade D.harmonious development

正确答案：B