Still many Senior Three students haven't realized reading English newspapers _______of great help to their English study. 

 Every possible means ______ to prevent the air pollution, but the sky is still not clear. 

I, who ______ your close friend, will try my best to help you out of trouble.

There was nobody in the room. Lying on the desk ____ a pair of glasses as well as a letter addressed to his wife. 

Professor Smith，along with his assistants，       on the project day and night to meet the deadline.