We hope that as many people as possible        join us for the picnic tomorrow.

— Are you still going to Shanghai for the Spring Festival?
— Yes, but I really _____ because I have a lot of things to deal with.

It’s cold here. _________ I switch on the heating?

According to common practice, the president _________ hold office for five years.

Facts prove that the world’s economic development is not a win-lose game but one in which all ______ be   winners.

To forbid the cheating strictly in this important exam, the authorities have released a rule that students _________ bring any reference books and stationery into their classrooms.

You       buy a gift, but you can if you want to.

—The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job?     
—_______ my students have a try?

A girl calling herself Mary is waiting outside; _____ she come in now?

―Thank you very much for giving me a hand when I was in trouble.
―Don’t mention it. I only did what anyone else _______ in my place.