More and more teaching _______ are being developed across the globe, which are sure to _______to make classroom teaching more lively and interesting.
| A．aids; help | B．assistance; help | C．aids; assist | D．helps; aid |
―When was the house built?
―It was built in 1949 _______ the PRC was founded．
| A．which | B．that | C．what | D．when |
________ is known to everybody, the moon travels round the earth once every month．
| A．It | B．As | C．That | D．What |
This is Mr．Smith, ________ I think has something interesting to tell you．
| A．who | B．whom | C．that | D．/ |
The school _____ my father teaches is a world-famous one, _____ was set up 100 years ago．
| A．where; which | B．which; which | C．/; where | D．where; that |
The most important thing _____ we should pay attention to is the first thing ____ I have said．
| A．which; that | B．that; which | C．which; which | D．that; that |