He chose to teach in a western province, though he _______ in the city for a better life.

It’s time ________ read in the reading room. It ________ from 9 a.m. to 5 p.m. every day.

Shut the window, _____ it’ll get too cold here[ ]

Ice-cream tastes _____, but it isn’t good _____ our health.

___________ caused the accident is still a complete mystery.