17The movie is to deucate people about environmental problems ______our planet

Where ____ you put the ruler? I can’t see it anywhere—–I put it right hereBut now it is ____

ather in Ningbo is rather cold in winter,especially when ____ that in my hometown

It had been snowing heavily for two days, ____all roads and streets.[ ]

The rescuers ________ to work as soon as they arrived at the spot of the accident.[ ]