About one third of the population in Beijing and Shanghai ______ netizens, but in poorest areas, only three or four percent ______ online.

The number of the people who can afford to buy their own house ______ more than 60%,but a number of houses _______.

He said that what Mary had bought from the supermarket that morning ________ only a     few potatoes, eggs and salt, but I don’t think what he said ________ true.

------ Why does the lake smell terrible? ------ Because large quantities of water _________.

 -- “____either you or he to go there?” --“_____is.”