1.good story does not necessarily have to have a happy ending,but the reader must not be left_____.
A.unsatisfied B.unsatisfying C.to be unsatisfying D.being unsatisfied
2. a moment nothing happened.Then ____ all shouting together.
A.voices had come B.came voices C.vioces would come D.did voices come
3.enever I met her,____ was fairly often,she greeted me with a sweet smile.
A.who B.which C.when D.that
4.____ by the advances in technoloy,many farmers have set up wind farms on their land.
A.Being encouraged B.Encouraging C.Encouraged D.Having encouraged