几道高一英语选择题、急

几道高一英语选择题、急
1.I don't remembe___the chance to try this method.
A.having been given B.to have been given C.having given D.to have given
2.The reason for all the changes being made___to us yet.
A.has not explained B.has not been explained C.had been explained D.were not explained
3.As we approached the work site,the workers were seen___the new house.
A.building B.build C.built D.to build
4.The composition___any more.
A.need not to be corrected B.doesn't need to be corrected