Mr.Liis busy _some important work in his office.nowAat b.for c,with选?why
问题描述：
Mr.Liis busy _some important work in his office.nowAat b.for c,with选?why
答
with；
with＋名词短语解释说明“busy”的内容，不用for是因为for后面加从句，表解释说明。at在此处无法解释。
答
with, be busy with sth 固定搭配
答
with
答
选C。
忙于做某事 be busy with sth 固定搭配。
O(∩_∩)O哈哈~
答
选择C,with
be busy with sth. 忙于做某事的~固定搭配(*^__^*)
答
with,be busy with sth,忙于...
答
c
这是busy的固定用法：be busy with sth.
即忙于某事
另有be busy doing sth.
即忙于做某事
答
选C。be busy with（sth）是忙于做某事之意。希望能够帮上您！