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. 小题1: A.to watch B.to study C.study D.play 小题2: A.noisy B.quiet C.crowded D.lonely 小题3: A.short B.quicker C.longer D.slower. 小题4: A.Last B.Next C.Before D.In 小题5: A.volunteering B.to volunteer C.volunteering D.volunteered