-Water is the most precious resource in the world.-So the government________every one of us to save water.
National Day ________ people singing and dancing happily in the street.
As there was no one she could________, she felt very helpless.
It was announced that only when the fire was under control ________to return to their homes.
—Do you have any idea what your former boss would say about you? —I don't know,________.
With a lot of assignment ________, little Tom still feels very easy.