用括号内所给单词的适当形式填空，每空格限填一词。

56. My grandfather still grows flowers in his            (ninety).

57. Since Alibaba appeared on the market, Jack Ma has become the       (wealth) man in Asia.

58. If you want to be a good English learner, you should pay attention to your ________ (pronounce).

59. More and more            (Europe) come to China for a visit every year.

60. We must take some ________ (active) to help the poor students in the northwest area of China.

61. Look! There are some birds _________ (fly) in the sky. They are very beautiful.

62. The twins __________ (usual) go to school by bike. But sometimes they walk.

63. Luckily, a friend of __________ (I) help me with the math last term. I passed the exam.