亲们快来~几道时态填空题/

亲们快来~几道时态填空题/
这一课的题目是现在完成时.
1时态填空：
1）There____________(be)great changes in Shanghai during the past decade.Shanghai _________________(become)more and more beartiful .
2)The German engineer ___________________(collect)a lot of Chinese stamps since he came to China,for he _________________(appreciate)Chinese history and culture
2用have/has been (to) ,have/has been in ,have/has gone to 填空
Where is Sara?
She_____1_____Australia.
Sounds great.___2_she ________2_____Australia before?
Yeah.She_________3________Australia many times.
Wow,cool!
She goes there twice a year to visit her parents .They _4___________there for 9 days.
How lucky she is!You know I ___________5_____(never) any foreign coun try .And I ______6____________ Shanghai ever since I was born to this world.