根据句子意思及首字母提示,用适当的词填空。

1. —What's the m____ with Jim?

    —I think he has a sore back.

2.—What are you doing on vacation? 

   —I am going c_____.

3. I often r_____ my bike to school. What about you?

4. May is the f______ month of the year.

5.How do you make a banana milk s_____?

6.I'm going to be a basketball p_____ in the future.

辙叉心宽50mm及以后处所，一条垂直裂纹长度（）以下时，应注意检查观测及时修理。

A、60mm

B、45mm

C、50mm

D、55mm