Pay attention what I will do carefully..

Is John coming by train —He should,but he ________ not. He likes driving his car.

____________________students are required to take part in the boat race.

While ________ to foreigners，you must try your best to make yourself ________.

In their efforts to persuade us to buy that product,shopkeepers have made a close study of human nature and have __________ all our little weaknesses. [ ]