1 . —There ________ a lot of tigers there, but now they are endangered.
—________ seriously we destroy the nature!

A．used to have; How	B．are used to be; What
C．used to be; How	D．used to have; What

2 . 在富裕的国家里，也有一些学生上不了学的。如果你有幸上学，你应该感激有这样的机会。
______ also some boys and girls ______ cannot go to school in rich countries. If you are a lucky dog, you should be ______ for the opportunity.

3 . 这是宣告捕鲸行动马上就要开始的呼声。
This was the call that announced ________________ a whale hunt.