Unfortunately, it was in Yushu County, ______ a 7.1-magnitude earthquake happened on April 14, 2010, ______ a large number of students were buried inside damaged schools.
A group of children ______ hide and seek in the garden.
Two kilograms ______ too heavy for a sick man.
Many a school and many a hospital ______ since 1949.
All that can be said ______.
Tom with his friends ______ volleyball since three o’clock.