__ I hand in the paper this week” “No, you ______. You _____ hand it in next week.

Hearing footsteps outside the door, she ______ her talk to another topic.[ ]

Why does Sara know so much about Angkor Wat?—She _______ there,or she may have read about it.

Many animals _____________the same fate as the largeextinct elephant because of the environment.

16．Large quantities ofinformafion，as well as methnely help，_______since the organization was built．