选择:He spent the whole day,( )in his study,( )a speech.

问题描述:

选择:He spent the whole day,( )in his study,( )a speech.
He spent the whole day,( )in his study,( )a speech.
locked;prepared?
being locked;preparing?
locked;preparing?
locking;prepared?

C locked in his study做状语,可以提到句首,不受spent的影响,真正受影响的是preparing