Easy #4 went over my head.
Easy #17 I thought line was a good answer, even if it strained a bit (train line, police line, gas line)

Med #18 I thought take worked (Take a picture, take a card, take a bath)

Hard #7 I thought of element, but decided measure was better (measure rain (gauge), measure wind (speed) measure carbon (carbon dating)

The rest of my answers matched the results. Thanks for posting. It was fun