There was a long queue for coffee. Having waited for 10 minutes, we ____ gave up.

Make sure the gas is turned off after a bath, which would ________ cause danger.

It seems that living green is               easy and affordable. A small step makes a big difference.

Of the two coats, I’d choose the red one, for I am ______ fond of it.

Playing on a frozen sports field sounds like a lot of fun. Isn’t it risky, ______?