第一节 单词拼写（共10小题; 每小题1分, 满分10分）
66. It’s not very ___________（方便的）to pay by cash.
67. This Chinese square table is a very valuable piece of （家具）.
68.My uncle got （订婚）to a beautiful girl last Sunday.
69.The house stood （空的）for a while.
70.Faced with a new （挑战）,the scientists are working day and night.
