Share Unit 7: 1.3 understand deeply about the present perfect
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Guijing's population/increase by/ 1.8 million
Suggested aswer: Guijing's population has increased by 1.8 million
The population density/ go up by/ 25%
Suggested aswer: The population density has gone up by 25%
the land area/ increase by/ 4.5 km2
Suggested aswer: The land area has increased by 4.5 square kilometres (km²).
build/150 new mansions
Suggested aswer: S+ have/has built 150 new mansions
