Do you know the danger caused by smoking?—Yes, too many cigarettes can lead to_______ lung cancer.

Give me a chance, ________ I’ll give you a wonderful surprise

(2013·四川省乐山一模)The pupils were playing games in the classroom ________ a gunman entered and began shooting wildly at them

It’s the second time that I ________ to Shanghai.-What great changes！It’s ten years since I ________ it last time.[ ]

My idea ________ to be true.