80．In near future, we will have a v　　　 of GM watermelons to choose from.

79．The audience roared with laughter at the a 　　　　crosswalk show.

78．Finally, the old couple m 　　　to persuade their son to give up his foolish idea.

77．Susan decided to buy the d 　　　　necklace which cost a lot of money.

76．The day when the Maori signed an agreement with the settlers is still c 　　　as a national holiday.