Theoptimallengthofanapwasanhourandahalf______peoplecouldgothroughacompletecycle.
A.so thatA B.even if C.as to D.as soon as正确答案A
Theoptimallengthofanapwasanhourandahalf______peoplecouldgothroughacompletecycle.
A.so thatA B.even if C.as to D.as soon as正确答案A