There was such a long queue for coffee at the interval that we ____ gave up.

— I think it’s beneficial to build a library near our dormitory building.—  　　　. It will be a great convenience.

I went there yesterday       to see my uncle .

Mr. Bryan is a/an _______ secretary in our office, for he is able to do tasks successfully, without wasting time or energy.

The students are ___ young people between the age of sixteen and twenty.