By the time that children start school at age 5 or 6, approximately how many words are they thought to comprehend?

Siblings share _____ of their genes on average.

A) 25% B) 50% C) 75% D) 100%

Burning your toast, having trouble opening an e-mail attachment, breaking a glass, and running late for an appointment are all examples of __________

a) uplifts. b) hassles. c) downturns. d) distress.