用所给词的适当形式填空. They are _____(fly) in the flowers.

问题描述:

用所给词的适当形式填空. They are _____(fly) in the flowers.

They are【flying】 in the flowers.
它们在花丛中飞翔.为什么不用动词原形?谢谢这是现在进行时。“正在飞”