33.ThesecondbookswasbyAugust1952,buttwoyearslater,theendwasstillnowhereinsight.A.tobecompletedB.tohavecompletedC.completedD.tohavebeencompleted选A,为什么?

Question

33.The second books was ___ by August 1952,but two years later,the end was still no where in sight.
A.to be completed B.to have completed C.completed D.to have been completed
选A,为什么?

Answer 1

was to是一种常用于强调句的短语
表示正在做