问题
选择题
. The secretary worked late into the night, ___________ a long speech for the president.
A．to prepare
B．preparing
C．prepared
D．was preparing
答案
答案：B
搜题请搜索小程序“爱下问搜题”
. The secretary worked late into the night, ___________ a long speech for the president.
A．to prepare
B．preparing
C．prepared
D．was preparing
答案：B
