--_________ can cormorants stay under the water?--_________ up to two minutes.
The girl devoted all her time she had _____ poor children.
The engineer was _______arrest _______murder.
It’s raining hard. We have to stay at home __________ going fishing.
—Look! That man looks like Mr Green. —It can’t be him. He _________ to America.
This is _______ empty bottle. But it is _______useful one.