Momaskedmeto_____________grandpawhenshewasout.
句子翻译：警方正忙于查明事故的原因
English_________inmanycountries.
句子翻译：让我一个人待着，以便我能想出一个好主意。
Throughout_______history,Englishlanguagehasgonethroughmanychanges.
Whoseeraseristhis?
--It's________.
