下列句子标点符号使用正确的一项是（　　　）。

    There are four seasons in China. March, April and May make the spring. June, July and August make the summer season. September, October and November make the autumn season. The rest（剩下）of months make the winter season.

    The Australia seasons are the opposite（相反的）of ours. When it's spring in China, it is autumn in Australia.

    Australia is in the south（南方）of the earth. June, July and August are the winter months. The summer is in December, January and February. It's very hot there, too.

    Near the North Pole（北极）there are two seasons. The winter nights are long. For more than two months you can't see the sun, even at noon. The summer days are long. For more than two months, the sun never sets（落下）, and there's no night.

物理小组活动时，老师要求大家试着用一块电压表和阻值为R₀的定值电阻等器材，通过实验测算出待测电阻的电阻值R_X．如图所示为小利所连接的部分电路．

电路中还缺少一根导线，请你帮助小利完成电路的连接，并画出实验电路图．