The number of the wild animals will become if we don’t take any actions to protect them.
In those days, we had no phones, so we had to keep in touch ________ letters often.
--- Did you have a sound sleep last night? --- Yes, never slept ________.
In my mind, no such_______ thing in our country as_______ Great Wall can represent the image and culture of China.
— pleasant weather it is today! — Yes, it is. Let’s go and enjoy the beautiful cherry flowers.
— Which is your favorite museum? — I think the best museum I like best in Zhongshan is Sun Yet-shen museum.