Hundredsofdrunkenleft-wingsthrewstone,bricksandbottlesatthepoliceandattemptedtoescape________butfailed. [ ]

How many students are there in each group— Usually each group _______ six students in our class.

He was quick and smart, and his brother ______ silly and clumsy.

The window ______, you need not wash it again.[ ]

It _______ we had stayed together for a couple of weeks _______ I found we had a lot in common.[ ]