【2015·浙江】Have you ever heard of the trees that are homes animals both on land and sea?
It was with great joy ______ he received the news ______ his lost son would soon return home.
As is known to us all, success usually ______ hard work while laziness can ______ failure.
She sat at her desk, with her eyes ______ on the book, ______ in its plot.
The young man rushed out of the room, ______ into his car and started it hurriedly, ______ to get home as soon as possible.
______ is known to all is that the old scientist, for ______ life was hard in the past, still works very hard in his eighties.