_________ the extremely hot weather, we continued having classes．

I know it’s normal for such a thing to happen，but we________it if we’d been more careful.

We are looking forward to________a chance to watch the opening ceremony of the London 2012 Olympic Games.[ ]

He doesn’t know _________ English because he hasstudied it for only ________ weeks

The “No.1 Document” is designed to help the rural population increase their incomes.— I believe that peasants’ life _____ better and better