Daniel is very modest. He never ___________ before his friends.

She will have a holiday as soon as she _____the work next week.

The struggle against the bird flu and the suffering _________ brought about have become a big concern across the world.

I wonder why you don’t do it as ______ and it’s the third time you have done so.

Could I use your mobile phone? I have to call my mom for the coming class meeting. –Yes, of course you _____________.