71/Giving lucky money to the young and the old at Tet is a common ______ in many Asian countries. A. behavior                               B. practice                         C. tradition 72/She used to live in an igloo: a domed house ______ from blocks of ice. A. to build                         B. built                                 C. building 73/I wish people in the world ______ conflicts and lived in peace. A. don’t have                   B. doesn’t have                               C. didn’t have 74/I have told you many times ______ the door open. A. not leave                      B. not to leave                 C. to not leave 75/I wish my friends spent less time ______ computer games and more time outdoors. A. play                                 B. to play                            C. playing 76/The farmers in my home village ______ rice home on trucks. They used buffalo-driven carts. A. used to transport     B. used to be transported         C. didn’t use to transport 77/A ______ is used to make the sound much louder so that many people can hear it from a distance. A. loudspeaker                               B. radio                                               C. television 78/I suppose it was a special occasion, ______? A. was it                                              B. wasn’t it                         C. don’t I 79/He could be f red for his rude ______ towards the VIP guest. A. behaviour                    B. practice                         C. tradition 80/A _____ is a building that has been made stronger and protected against attack. A. fortress                                           B. cathedral                       C. temple