Your father is sleeping. You'd better ________.
A.not wake up him B.not to wake up him C.not wake him up D.not to wake him up
We'll have a meeting next month. Many important people ________ to it.
A.invite B.invited C.is invited D.will be invited
I ________ the Great Wall twice. The last time I ________ there was two years ago.
A.have been to; go B.have gone to; go C.have been to; went D.have gone to; went
They are watching TV, ________ the others are listening to the radio.
A.and B.so C.or D.that
The desk is in a mess. Would you please ________ your books?
A.take up B.take away C.turn on D.turn off
（2017·四川德阳·33）My mother has taught in this school________ she was twenty years old.
A.for B.until C.because D.since
