句型转换（每个空格只填一词）
【小题1】They have built many houses in the village in the past few years.
Many houses ________ ________ ________ in the village in the past few years.
【小题2】I have finished the three new projects and am sure I can apply my experience to this job.
After the three new projects ________ ________ ________, I am sure I can apply ray experience to this job.
【小题3】They have found a good place to build a gym in the community.
A good place ________ ________ ________ by them to build a gym in the community.
【小题4】They haven’t yet decided how to solve that difficult technological problem.
How to solve that difficult technological problem ________ ________ ________ by them yet.