句子写作：Thepianoplayerbegantosingloudly.
AustralianAboriginesbelievedinacreativeperiod,usuallyreferredtoinEnglishas________.
Duringthepasttwodecades,researchhas________ourknowledgeofdaydreaming.
Onecanfigureoutthemeaningof“airmail”tobe“mailbyair”byits______.
ForelectoralpurposesBritainisdividedinto659constituencies,eachofwhichreturns________totheHouseofCommons.
