问题
单项选择题
安全帽帽带系紧下颚（）mm。
A.15
B.10
C.20
D.5
答案
参考答案：B
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安全帽帽带系紧下颚（）mm。
A.15
B.10
C.20
D.5
参考答案：B
| 从对话后的选项中选择适当的选项补全对话。 | |
| At a friend's house. A: 1________ B: I'm worried about my daughter. She can't decide about college. A: Don't worry. She's only a little girl. B: 2________ But she disagrees with me about everything. A: It doesn't mean you're a bad mother. 3________ B: Really? A: Yes. He used to argue with me all the time. I supposed he was just trying to be independent (独立). B: I guess you're right. 4________
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