that boy is busy ()reading the book ,her mother is busy()her clothes.

问题描述:

that boy is busy ()reading the book ,her mother is busy()her clothes.

X
with

第一个空:不填 或者 in ,be busy (in) doing sth
第二个空:with
I am busy doing my homework . = I am busy with my homework.

第一个空不填第二个填with,那个男孩儿忙着读书,他妈妈忙着搭配的衣服

都填with
be busy with doing sth 忙于做某事
那男孩忙着看书,而他妈妈忙着做衣服。

that boy is busy (in)reading the book ,her mother is busy(with)her clothes.
be busy in doing sth 表示过去或现在着重干/忙于某事.
be busy with sth 表示现在忙于某事