We appreciate ______ us know the change of the date for the meeting.

Carelessness always contributes _______ car accidents. Therefore, drivers are advised to concentrate their attention _______ driving.

______ the programme, they have to stay there for another two weeks. [ ]

Come on, please give me some ideas about the project.–Sorry, with so much work ______ my mind, I always break down.

If you are not satisfied with their products,you can ________. It’s your right. [ ]