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