一Have you mended your shoes,Bob? 一Yes , I ______ them twenty minutes ago.
Jim is so clever that he can do everything ________.
They are having a meeting in the next room, so we must do everything ________.
He learned hard ________ he could go to a good university.
He gave his life to ________ Chinese soldiers.
Mao Zedong is remembered ________ his greatness.