请编写程序,自定义一个方法实现对“1+3+5+7+…+99”的求和功能。提示：1） 使用循环语句实现自然数1~99的遍历。2） 在遍历过程中，判断当前遍历的数是否为奇数，如果是就累加，否则不加。
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_______, you would have met him.
A. If you came earlier
B. If you should come earlier
C. Had you come earlier
D. Should you come earlier
__________, the crops would be saved.
A. Could it rain
B. If it had rained
C. If it rained
D. Should it rain
It’s high time we ______ cutting down the rainforest.
A. stopped
B. had to stop
C. shall stop
D. stop
以3为实部4为虚部，Python复数的表达形式为___。
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