They have not made any decision on ______ they are going to do to deal with the waste and control pollution.
  A. that            B. which            C. if                D. what

 Sometimes we are asked ______ we think the likely result of an action will be.
  A. that            B. what             C. which            D. whether

 He was lucky enough to sell his car for exactly ______.
  A. where he had paid for it          B. what he had paid for it
  C. what he was paid for it           D. which he had paid for it

 When the holidays were drawing near, I asked my American friends ___ was the best way to travel in the United States.
  A. that              B. what             C. such            D. that

 He told me the news ____ the Queen would visit China the next month.
  A. that              B. which            C. when           D. when

 They lost their way in the forest and _____ made matters worse was that night began to fall.
A. that              B. this              C. what            D. which

 I remember_______ this used to be a quiet village.
A. how         B. when         C. where         D. what

 He made a promise_______ he would help me.
A. what         B. when         C. that         D. which

 The problem is_______ he has enough time.
A. if         B. whether         C./         D. that

 _______ the sports meet will be held depends on the weather.
A. Whenever         B. If         C. Whether         D. That