Food safety is _____ important, so the government spares no efforts to prevent food pollution.
Can you give me a case ______ this phrase can be used?
Recently I bought an ancient Chinese vase, ______ was very reasonable.
The villagers, _________ had been damaged by the flood, were given help by the Red Cross.
With so much work his head all day long,he feels rather stressed in his daily life.
---Can I tell my best friend about it? ---No. I don’t want anyone else to know. You _________ let it out.