13．A：Hi，Olive．Long time no see． B：Hi，Alison．Yes，I was on vacation last month． A：Where did you go？ B：（71）I went to Guizhou with my family． A：What did you do there？ B：（72）I visited many places of interest． A：Who did you go with？ B：（73）My parents． A：（74）Did you have a good time？ B：Yes．I had a great time．（75）What about you？ A：I just stayed at home most of the time to read and relax．
8．What do the farmers do if the rivers are polluted？ A．They can't use the water for their crops． B．They can use the water for their crops． C．They can make their crops grow well．
