Professor Hunter was soon told ____he discovered was not important to them.
| A．why that | B．why what | C．that why | D．what why |
She said she would spend her holiday ___ Beijing.
| A．on | B．at | C．in | D．For |
Whenever I go to Beijing, ____ is quite frequent, I will go to visit the Great Wall.
| A．where | B．which | C．as it | D．It |
The two boys fought and fought until one ______.
| A．gave up | B．gave in | C．gave | D．gave off |
He will _____ our class to sing at the school singing contest.
| A．take place of | B．stand for | C．represent | D．representative of |
John _____ knowledge of radio just by staying around the radio station.
| A．caught on | B．worked up | C．took up | D．picked up |