______ anniversary is the day exactly 50 years after a marriage, often celebrated with a party.

Does your brother mind calling at home if his patients need his help?

If you are invited to someone's house for dinner in the United States, you should (31)_______ a gift, such as a bunch of flowers or a box of chocolates. 

A friend of mine phoned _______ me to a party.

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

I'm delighted hearing that you have made much progress in your study recently.

They let their children _______ up late at weekends.