Mary is always ready to do some __ work at the local geracomium（敬老院）in her spare time.

So many thousands of ___________people died.

Two Chinese cargo ships, the Hua Ping and Yu Xing 8 were attacked by _____________ armed people on the Mekong River on Oct.5.

The door remained ____. I didn’t know where he had gone to .

_____should not be allowed to go out at night.