问题
选择题
Mary is in good _____because she spends an hour ____around the playground every day.
A．healthy, run
B．healthy, running
C．health,in running
D．health, on running
答案
答案：C
题目分析：句意：玛丽身体健康因为他每天花费一个小时的时间围绕操场跑步。Be in good health 固定词组身体健康，spend+时间+doing固定句型表示花费多长时间做某事，根据语境故选C