67 A aim at
　　68 D varies
　　69 C in control
　　70 B possess
　　71 D vast
　　72 A but
　　73 B essential
　　74 C in touch with
　　75 A acquire
　　76 B profession
　　77 D only
　　78 A with
　　79 C encourage
　　80 C interests
　　81 A broaden
　　82 A amid
　　83 D sake
　　84 B make
　　85 A field
　　86 C meaningful