单项选择题
They were all very tired, but（）of them would stop to take a rest.
A.any B.some C.none D.neither
单项选择题 They have done（）work these days.
单项选择题 They all go outing on such a warm spring day（）Mark. He is busy with his lessons now.
单项选择题 They（）each other for more than twenty years.
