The global warming is more and more serious, for which human beings ______．

I can’t find my dictionary.–Don’t worry about your lost book. You can use _______.

When you have western food, you should use knife and fork properly. The underlined part means“_____ ”.

____ you _____ our new music teacher?– – No.But Jack said she _______ the music room.You can find her there.

Is this the first time you _____Chengdu ?—–No. But the first time I _____here, the city wasn’t so beautiful.