“______ the friendship between our two people last forever!”, and with this sincere hope, the president concluded his speech.

Have you cleaned out the refrigerator _______? —Yes, I have done it ________. But I haven’t taken out the rubbish ________.

Many people hope to live in a place ________the weather is always warm. [ ]

I don’t think one can keep healthy ______ taking enough exercise.[ ]

When will the second class begin? —_______ two minutes. [ ]