phần lớn các chất nóng chảy hay đông đặc ở một nhiệt độ xác định. nhiệt độ đó goi la nhiet do nong chay

Choose the best answer for each of the following sentences
He had changed so much since the last time we met that I …….. him.

A. could recognize

B. could hardly recognize

C. wouldn’t have recognized

D. don't recognize