Having an outdoor meal is always fun, but it can also be damaging to the planet if ______.

Mum, would you please buy me an MP5 player?—If you can help do the dishes the whole vacation, you ________ have one as a reward.

My cousin David was born _______ 2000, _______ a winter afternoon _______ December.

I’ve finally finished my research paper.—______________. It must have been a hard job.

What a pity! I ______ in Hainan two more days, but something urgent needed to be dealt with back home.