Passengers are ______to look out of the window when the train is moving. 

—I’m sorry to_ _______you，but can you tell me the way to the nearestsupermarket?—I will do some shopping，too .Shall we walk there together?

I ______ from the crowd an old friend of mine whom I hadn’t seen for ten years. 

To see if his new bike works properly, Jane could hardly wait to _____.

 I ____ him by surprise and he had no time to think of an excuse.