________ has already been pointed out, only by correcting mistakes can you make progress.
| A．It | B．As | C． That | D．What |
He doesn’t feel very tied after the heavy work, because he is used to ______ for hours without a rest.
| A．work | B．working | C．works | D．worked |
Peace and development are not only the goals of China, but also the most meaningful direction _____ the whole world should take.
| A．which | B．that | C．what | D．in which |
After Marco Polo came to China, he became friends with ________ Chinese emperor of _________ Yuan Dynasty named Kublai Khan.
| A．an; the | B．a; the | C．the; a | D．a; a |
—Did John ask you to play tennis this Saturday?
—Yes, but I wish it_____raining before tomorrow.
| A．stops | B．stopped | C．will stop | D．would stop |
Bill was doing a lot of physical exercise to build up his_____.
| A．ability | B．force | C．strength | D．mind |