99. Two teachers teach at the same school. One is the mother of the other’s son. What relation( 关系 ) are they to each other?______________________

98. What is black when it is clean and white when it is dirty?______________________

97. Li Ming is the only boy in his family. He is the apple of their eye.　

What’s the Chinese meaning　 (意义) of　 “the apple of their eye” in the sentence？ 　　　　　　　　　　　　　

96. Look at the numbers blow. What’s the number after 48?

　 9,　 12,　 21,　 48,　 ? , …　　 　　　　　　　　

95. I’m s__________ at you playing with dolls at your age

94. Jim b__________ a new book from the bookshop yesterday.

93.There are many people in the street , it was c___________.

92.We had fun r________ horses in the park.

91.A:What was the weather like in Beijing yesterday ?　 　B: It was r_______ .

90. I think __________(地理)is a kind interesting, do you think so?

B. 根据句子意思和所给首字母,写出下列单词的正确形式