All the children like the teachers ________ can understand them.
| A．what | B．which | C．who | D．whose |
________ made kung fu popular in the west. He is my hero.
| A．Christopher Columbus | B．Bruce Lee | C．Pelé | D．Elvis Presley |
On the night of February 14th, 2011, all the Chinese _________ by Guo Mingyi, a very common worker who ________ more than 180 poor children since 1994.
| A．are moved, helps | B．moved, helped |
| C．were moved, has helped | D．moved, have been helped |
The Nanjing Yangtze River Bridge is still very strong, ___________ it is almost 43 years old.
| A．although | B．but | C．so | D．because |
—__________ do I have to change the robot’s batteries? —Every two months.
| A．How long | B．How soon | C．How often | D．How many |