重写句子：Alanpassedthetest.Alanhadstudiedhard.Alanhadunderstoodthematerial.(complexsentence)
支持代孕的理由有
Thosewhochangemobilephonestoofrequentlywillhavetopayforbeing______.
Duringthepasttwodecades,researchhas________ourknowledgeofdaydreaming.
________，hehadnotimetorest.
