马尾松、黑松的叶通常是_________针1束，但黑松的叶粗短而硬。
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红豆杉与南方红豆杉非常相似，主要区别是红豆杉的叶缘_________。
Please turn to page 95. Choose the best answer to complete each of the following sentences according to the information contained in the listening passage.1)This talk is mainly about ________.
A. why teenagers refuse to listen to their parents
B. what the larger problems in the parent-teenager relationship are
C. what needs to be done to improve the parent-teenager relationship
D. what causes the communication problem between teenagers and their parents
The speaker says that difficulty in communication between teenagers and their parents is mainly caused by ________.
A. generation gap
B. misunderstanding
C. lack of communication
D. different styles of thinking
The “taking out the trash” incident is a good example to show that ________.
A. teenagers should communicate more with their mothers
B. teenagers usually refuse to help their mothers with house chores
C. teenagers often miss the implied message in their mother’s instruction
D. teenagers are usually unwilling to follow their mother’s instructions
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