56. 我爷爷七十岁了，但看起来依然帅气。

    My grandfather is 70, but he still                                  .

57. 我们每年三月植树。

        We plant trees                    every year.

58. 如果你不知道事实，请保持沉默。

    If you don’t know the truth, please keep                              .

59. 请访问我们的网站，来购买特别的礼物。

    Please visit our website to                                         .

60. 多么有用的词典啊！

        What                               they are!