It was a pity that he missed the meeting_________ in London last month.

• A、held

• B、to hold

• C、to be held

• D、having held

What will be difficult when the son attends graduate school?

• A、He will not call his mom so often.

• B、He will not give his mom any gift.

• C、He will spend holidays at home.

• D、He will be far away from home.

54.________.