1 . The number of tourists to the resort   ________ (decline) by 10% in the past ten years. (所给词的适当形式填空)

2 . Car prices______ (decline) for six months because these prices are negotiable. (所给词的适当形式填空)

3 . The country’s economy ______________ (decline) in the past twenty years. No one knows how long it will be before it stops decreasing. (所给词的适当形式填空)