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五、词形转换（共7小题，计7分）
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.