We should take good care of the elderly, as they are ______ to the sudden change of weather.

Air is________and of no smell but we can feel its motion when there is a wind. 

The passer-by jumped into the cold water to save the _____ boy, who cried for help, but it was too late and the boy was _______ at last.

 Life in that poor town is _______ a bed of roses.

I’d be＿＿＿, if you could give me an early reply.