I.用适当的连接词填空
1. — What made her so upset?
—________ she failed in her mid-term examination.
2. Honesty is a kind of quality and that’s ________ it takes to communicate with others successfully.
3. The view ________ many scientists hold is ________ too much emission of carbon dioxide is destructive.
4. The reason ________ some students fight hard to enter this key school is ________ many students in this school have been admitted to famous universities.
