Match these items. 1. listen to various experts about the bill, both supporters and opponents of the bill override 2. two-thirds majority vote needed in session 3. activity concerning a bill which may include debates and compromise floor action 4. the time when congress is active and members are present, fulfilling their respective duties hearings

The correct matching are as follow:
1. HEARING: Listen to various experts about the bill, both supporters and opponents of the bill.
2. OVERRIDE: Two-thirds majority vote needed.
3.FLOOR ACTION: Activity concerning a bill which may include debates and compromise.
4. IN SESSION: The time when congress is active and members are present, fulfilling their respective duties.