The population of many Chinese cities has _________ doubled in the past 30 years.
She promised to be here at 8:00, but she never ______.
The fishing village where they went on a journey lies in is now part of Hainan province.
---Did you sleep well here? ---_________. I was tired after the day’s work and was soon dead to the world.
I didn’t see her in the musical hall this evening. She have sung at the concert.
—I’m thinking of the test tomorrow. I am afraid I can’t pass it. —______! I’m sure you will make it.