25. Thirty years ago this month,China's leaders launched an economic revolution.___________the door to free market reforms and foreign trade.
______ in Shanghai for more than ten years, he know the city very well.
Study hard , ______ you will not pass the exam .
I hate going out alone,so I often ask my friend to ________me.
Harry Potter is such an interesting book _______all kids like to read.
Hang your wet towel over the chair to ________ it ________.