问题补充：
69. It is raining cats and dogs. This sentence probably means .
A. There are some cats and dogs in the raining.
B. Some cats and dogs are falling down together with the rain.
C. The cats and the dogs are all wet in the rain.
D. It is raining heavily.
答案：
A. There are some cats and dogs in the raining.
B. Some cats and dogs are falling down together with the rain.
C. The cats and the dogs are all wet in the rain.
D. It is raining heavily.
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