用所给单词的适当形式填空
① The doctor has saved three ____(life) today.
② Mike's____(foot) are big , but his ____(tooth) are small.
③____(thousand)of visitors visit Mount Huang every day.
④The Greens____(have) been to Hong Kong twice.
⑤____(orange) is my favourite fruit.
⑥The____(leaf) turn yellow in the autumn.
⑦There're two____(Japanese) and three ____(German) on the bus.
⑧The guide has collected all the ____(visit) ID cards.
⑨There’re aboutnine ____(hundred) students in the school.
⑩____(million) of people has no houses to live in after the earthquake.
