句型转换：按要求完成下列各句，每空一词。

Is Bill in today? (同义词)

Is Bill ________ ________today?

A: Is Bill in?

B: Sorry, he's not 　　　.　　　

[　　]

A.home　   　　B.in home

C.at home　　　D.on home

从所给的四个选项中选择最佳答案

——Is Bill in, Sam?

——______, he's not at home．

A．Sorry　　　B．Excuse me

C．OK　　　  D．Yes

－Hello! Is Bill in?

－Sorry, he's ________.

[　　]