We have to work for ________ to finish the work.

His idea was such a good one ______ we all agreed to use it.

Linda, together with her parents, ______up the mess in the park at the moment.—It’s meaningful to be a volunteer. Let’s join them.

Excuse me, but I don’t think you can take photos here.— Sorry. I _______ this is no-photo zone.（地区）

Miss Li Mary’s MP4 when they were having an art class yesterday.