John is the only one of the students in the class that never _______ a mistake even when it is pointed to him.

We were in our investigation(调查)by the cooperation of the local police.[ ]

With the development of modern science and technology you can take your favourite radioprogrammes with you on the move and listenyou like．

We all joined the game______ Bill becausehe was hurt and had to stay in bed.

The great success of this programme has been ____ due to the support given by the local businessmen.