The repair work of Angkor Wat _____would last at least 10 years was completed within 8 years .

A which people supposed           B which people supposed it

C which people supposed that is       D people supposed that

( )是变更工作中最敏感的，承包商总希望在变更工作开始前即能确定变更费用额，而业主则希望先开始实施变更工作，然后双方再协商确定变更工作的费用，其主要目的是为了避免拖延工期。

A．变更费用

B．工期延误

C．主体变更

D．合同变更