The population of the world in 20th century became very much _________than that in 19th.
—The radio _that there will be another heavy rain in Guangdong. —Too bad. It has rained for the whole week.
Thank you for__________ me so well.
They will go to Shanghai for a trip ________ next month.
— What subject do you like best, Judy? —____. I can learn about famous mountains and rivers.
I have __________ to tell you.