一、单项选择： 从下列各题后所给的四个选项中选择最佳答案填空。
( )1． My father＿＿＿＿＿＿ill yesterday．
A． isn B． aren C． wasn D． werent
( )2． ＿＿＿＿＿＿your parents at home last week﹖
A． Is B． Was C． Are D． Were
( )3． The twins＿＿＿＿＿＿in Dalian last year． They＿＿＿＿＿＿here now．
A． are; were B． were; are C． was; are D． were; was