At the beginning of class, the noise of desks __________ could be heard outside the classroom.
.It is well known that water is not _____ endless resource,nor _____ that can be made once more.
---Mom. I’m so tired. I can’t walk any further. ---______, my dear. You can make it.
---Why are they taking all the equipment away? ---- The job ________, they are packing up to leave.
--- What about Mr. Brown’s lecture? ---- I understood most of what he said, but not ________ word.
It was announced that only when the fire was under control ________ to return to their homes.