We think it’s probably a good idea for parents to allow teenagers ____in groups during the evenings. I know we get ____sometimes, but we learn a lot from each other. We also think that vacations should be ____.At present they’re too short. Longer vacations would give us time to do things like volunteering. ___summer I had an opportunity ___at the local hospital, but I couldn’t because I had to go back to school.

A．to watch B．to study C．study D．play

A．noisy B．quiet C．crowded D．lonely

A．short B．quicker C．longer D．slower.

A．Last B．Next C．Before D．In

A．volunteering B．to volunteer C．volunteering D．volunteered