Paul is directly (responsibility) ____________ for the efficient running of the office.
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It was with great (sad) ____________ that I heard of your husband’s death.
The project has attracted considerable criticism from the (science) ____________ community.
The police hope to avoid a repeat (perform) ____________ of last year, when the festivities (庆典) turned into rioting (骚乱).
We could take on extra staff ----that's one (possible) ____________.