根据语境，选择下框中的单词替换划线部分，使之意思一致。

explore     obviously     request     graceful       tap       shelter       track

【小题1】We need a piece of equipment to control the flow of water, gas etc from a pipe or container.
【小题2】Her movements are always in a smooth and attractive way.
【小题3】Management need to discuss and think carefully about ways of improving office security.
【小题4】All around me, people were running for protection from the wind and rain.
【小题5】Anderson repeated his formal demand that we postpone the meeting.
【小题6】Police have been searching for the four criminals all over Central America.
【小题7】What he said means that a fact can easily be noticed and understood