根据所给提示，完成句子。每空一词，含缩略词，并把答案写到答题卷上对应题目的横线上。

70. She has already collected a number of stamps. (一般疑问句)

   _______she collected a number of stamps _______?

71. He should talk to his friend . (对划线部分提问)

   __________ should he_________ ?

72. He bought that book three days ago. (同义句)

   He __________ _________ that book since three days ago.

73. 我们相信胜利一定会属于我们班级。(完成译句)

We believe that success will _______ _________ our class.

74. 在铃声响之前，请不要答题。(完成译句)

Please         answer the questions         the bell rings.