问题补充：
Rarely .
A. the temperature falls below zero here
B. falls the temperature below zero here
C. does the temperature fall below zero here
D. has the temperature fallen below zero here
答案：
A. the temperature falls below zero here
B. falls the temperature below zero here
(答案→)C. does the temperature fall below zero here
D. has the temperature fallen below zero here
解析：否定意义的词开头句子采用部分倒装，描述客观事实或真理用一般现在时态。句意：这的温度很少降到零度以下。 选C
