8．My aunt is an engineer in America．She（64）has worked（work） in the Company of Microsoft since 1986．Last month she came back to China．We were happy to see her on May Day．After we finished lunch，we showed her around （帶她參觀） our hometown．
"This hotel（65）was built（build） last year．Look!The workers（66）are putting（put） up（建造） another one over there．""What a great change!"aunt said．
"We（67）will plant（plant） more trees and flowers in the town soon．And we'll do something to stop the factories from（68）pouring（pour） the waste water into the river．"I told her．
Aunt was very pleased with what she saw．When we asked her （69）to stay（stay） longer，she answered，"No，I can't．I must fly to Beijing tomorrow．I have an important lecture to give．If I
（70）have（have） time，I'll certainly come back again．Though I live in America，I'll always be Chinese．I should do something for our hometown．Let's make contributions（貢獻） to it together．"
