1．This winter the weather of the south is quite ____________(disappoint)．
答案：disappointing
2．The car ____________(repair) in the garage was made in Germany thirty years ago.
答案：being repaired
3．Mary was often heard ____________(sing) in the next room.
答案：singing
4．Not ____________(know) her address, I can’t visit her personally.
答案：knowing
