If It had been possible, I would have helped him, but I ______ too busy the.

The Great Wall is _______ tourist attraction that millions of people pour in every year

I _______ buy a new car if I _______ a million dollars．

I could see a low bamboo hut standing there ______ grass sticking out ____ the roof

_______ impressed me was the boy’s ability to dealwith this kind of difficult physics problem.