人体内卵细胞完成受精作用的场所是（ ）
在括号里填上合适的量词。
一____蜗牛 一____草莓 一____蘑菇 一____树叶
—Too much homework has made me tired these days, Mr. Wang.
—That's true. But a small tree won't grow into a big tree it experiences lots of winds and rains.
