【简答题】A.To show the key role played by air traffic controllers. B.To show the great responsibility shouldered by the pilots. C.To give an example of air disasters. D.To show that air travel is far safer tha...
【简答题】succeed advanced common reflect reason smart deadline besides nearly intelt 1. George is a very boy; he is one of the best students in his class. 2. You have to work hard if you want to ...