The children have been playing with my hat they've knocked it out of ______. 

.Has the Channel Tunnel improved the _______of goods between the British Isles and mainland Europe?

I listened to Dr. Johnson’s lecture about biology, but I failed to get its key ____.

School children must be taught how to deal with dangerous ________ .

Linda didn’t get there on time because of the bad weather. What’s more, her car  was in poor      .