A:is easy to look after
B:are easy to look after them
C:are easy to look after
D:is easy to look after it
The doctor advises me to take the medicine t____ a day, in the morning and evening.
阅读刘禹锡的《秋风引》一诗。
《秋风引①》刘禹锡
何处秋风至?萧萧送雁群。 朝来入庭树,孤客最先闻。 注:①引:古代的一种诗体。