MISSING LINK CVIII

Each trio of words below shares a Missing Link - that is, its members have something in common, obvious or not. For example, RIVERS, NOSES, & VIOLINS can all have BRIDGES.

1. Harp..........Pilot..........Graph
2. Job..........Cone..........Ring
3. Ties..........Friends..........Quarters
4. Yellow..........Scarlet..........Gold
5. Out..........Knee..........Question
6. Stop..........Change..........Cut
7. Book..........Car..........Night
8. Stand..........Spring..........Shake
9. Cow..........Crop..........Flow
10. Door..........House..........Building

Answers:

1. Auto
2. Nose
3. Things that can be close
4. Kinds of fevers
5. Trick
6. Short
7. Kinds of clubs
8. Hand
9. Cash
10. Out