________ on ten years of observation and study, Professor Wang announced that everyone dreams every night,whether they realize it or not.
The classical book is still worth it ________ it doesn’t sell well.
I was bored staying here for years, ________ whether I should try someplace different.
Twenty percent of the people on the earth have no ______ to clean drinking water.
________ you are travelling near or far, we’ve got tips on saving money and packing smart.
The boss is an ________ person —— respected even by those who disagree with him.