68. I picked ______ (少) apples than you.

67. In spring, we can hear birds ______(歌唱).

66. Have you made a　 _______________ (决定) how to go there?

65. The People’s Republic of China was　 ___________ (成立) fifty-five years ago.

64. The world’s population will pass six billion by the end of the _____　　 　___

(.第二十)century.

63. Some _________ (德国人) visited our school last month.

62. Are you ______________ (感激的) for what he has done?

根据下列句子所给的汉语注释及句意，写出句子空缺处的各单词的正确形式。每个空格限填一词。

61. His grandmother has been ________(死) for five years.