48 If the building project __________ by the end of this month is delayed, the construction company will be fined.
A) to be completed B) is completed
C) being completed D) completed

正确答案是A
句子的意思是：如果本应该这月底完工的该建设工程延期完工，建筑公司将被罚款。
If the building project __to be completed __ by the end of this month is delayed是条件状语从句，to be completed 在从句中作the building project 的定语，意思是将被完成、应被完成。the construction company will be fined是主句。答案C,D意思说不通,因为答案C) being completed 的意思是正被完成， D) completed 是已被完成。而如果选答案B) is completed 则从句就变主语从句，意思是“建筑工程是否月底完工”，这显然与delay不能搭配，而且整个句子意思也说不通。