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 |
__________ his father is? I don't know why he always wears the uniform.
| A．What do you think | B．You think what |
| C．What you think | D．What did you think that |
Yi Jianlian, a promising new star, said goodbye to CBA for NBA and is ready to __________ in the world of basketball.
| A．get off | B．take off |
| C．turn off | D．come off |
When taking an examination, we are usually not allowed to __________ dictionaries for the words we don't understand.
| A．look up | B．look for |
| C．pick out | D．refer to |
Every possible means __________ to prevent the air pollution, but the sky is still not clear.
| A．is used | B．are used |
| C．has been used | D．have been used |
You know Australia is a big country, but you may not know how easy it is to __________.
| A．get around | B．get along |
| C．get over | D．get in |