Jenny was very sad over the loss of the photos she had shot at Canada, ____ this was a memory sheespecially treasured.
The United States of America _____one of the most developed countries in the world.
The whole class _____the teacher attentively.
Jane is one of the best students in her class who _____by their teacher.
Those who ____ in ____compositions, please hand them in this afternoon.
Three-fourths of the homework _____today.