Every solid object ______ reflect a sound，varying according to the size and nature of the object． 

—Why didn’t you put your cellphone in your overcoat pocket?—I ________, but I was afraid it would be stolen.

I’d rather you did some housework when you are free ,but you______ .

—Did you go to the fashion show last week?—I _____, but I was fully occupied the whole week.

Such a good opportunity may not come again, so you ____________ let it go this time.