下列各句中，没有语病的一项是

John’s ability to learn from observationsand experience _______ greatly to his success in public life.

There were a lot of people in the park. We had ______ to take a rest, so we got very tired.

下列各句中，表达得体的一句是（ ）

They often quarrel with each other aboutsmall things, which they couldn’t ________ finally.