I plan to build an unusual house. It out of old things.

Workers built shelter for survivors, _________ homes had been destroyed.

The idea puzzled me so much that I stopped for a few seconds to try to________.[ ]

My computer began to return to the ______ running state after I killed the virus by newly-updated Kaspersky.

You look tired.— YesI ___ non-stop until 8 o’clock this morning