试题题干
Fill in the blanks with an item as required.
With a subordinator:
When you leave the office, please see to it
all the windows have been closed and lights turned off.
参考答案
试题解析
本题考查从属连词的用法。see to it that：保证，务必。see to后面不能直接加宾语，所以要加一个形式主语it，后面的that引导的是宾语从句。
句意：当你离开办公室时，请务必关上所有的窗户并且关灯。