Because of the bad weather, my mother ____ and lay in bed. She ______ for a week.
| A．has been ill; was ill | B．fell ill; has fallen ill | C．fell ill; has been ill | D．fell ill; is ill |
He never reads anything _______ is not worth reading．
| A．as | B．which | C．who | D．that |
―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 |