I think Amy and Steve can help me with the school project.—But they ________ back to Australia.

Susan, can I wear jeans and a T-shirt to the evening party—OK. But a dress might be ________.

When _____ about one of the biggest concerns today, many citizens mentioned the sharp rise in housing price.

My documents are always ______ out according to the contents(内容) and dates so that I have no trouble in finding them when they _______

They are determined to go into the dark cave, ________ my warning of danger.