Помогите.. The world's most ... (excite) railway adventure - a 14-day train trip from London to New York could become a ... (real) within 20

Помогите.. The world's most ... (excite) railway adventure - a 14-day train trip from London to New York could become a ... (real) within 20years. Russian and Amrperican ... (politics) are now drawing up plans for the ... (construct) of the 4,600 miles of track and a 50-mile tunnel under the Bering Strait to link East and West by rail.