______is the Changjiang river in China, do you know?—Yes, it’s about 6,380 kilometers long.

I am tired after the long work. I want to have a _______.

The number of giant pandas is getting _________ because their living areas are becom­ing farmlands.

How do you practice spoken English? —By conversations in pairs with our classmates.

He would have come here on time, but he _____ in the heavy traffic on the way.