The country's railway system has launched online ticket-booking and a real-name ticket purchasing system, and _______ requires passengers to provide their ID numbers when buying tickets.
| A．which | B．that | C．what | D．this |
After _________ all the difficulties, he has developed a habit of facing everything bravely, and is now living a simple but full life.
| A．looking through | B．going through | C．looking up | D．going up |
President Hu Jintao urged every effort ________ to rescue and treat the injured German tourists in a traffic accident in Tianjin on the morning of Oct1, 2012.
| A．is made | B．must be made | C．be made | D．should make |
While ______ himself in the newspaper in a cafe , he got his pocket picked.
| A．having buried | B．buried | C．burying | D．to be buried |
The Internet and the effectbrought about did a lot of good to our daily life and work. That is to say, the Internet has made a great difference in many aspects.
| A．that | B．what | C．which | D．it |
_____ all the seats full, he had no choice but to stand up.
| A．For | B．As | C．Though | D．With |