I listened to Professor Chen-Ning Franklin Yang’s lecture about his study and physics, but I failed to get its key ______ .
We usually the moon and share mooncakes with families on Mid-Autumn Day.
The more careful you are, mistakes you’ll make.
The expressions they use might whom they are speaking to or how well they know each other.
— What did Tina say? — Sorry, I didn’t what she said.
— Are Jiangsu and Zhejiang famous for silk? — I think so. I know, more than half of the silk in China is produced in Jiangsu and Zhejiang.