Hou Yi was _________________ sad _________________ he called Chang’e’s name to the moon loudly every night.

smoke here – If you____, choose a seat in the smoking section.

Try to be more careful next time. Carelessness only________ mistakes.

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

The tiger, once a _________animal to humans, is now ____ disappearing on the earth.