Nowadays, many people walk to work ____Copenhagen Conference calling for living a low-carbon lifestyle to cope with global warming.
A quarrel _________, which made him ______ his family.
1 Having never met with such a _____ problem, he felt _____ and didn’t know how to solve it.
Our class _______ 55 students at that time.
She felt herself _______ by her friends.
As a teacher, he is not only strict _____ his students but also strict _____ his work.