Is Sarah coming ? — No. She should have let us know earlier , but _______ she has been very busy recently.

Marry failed the exam yesterday.—Give her a phone call. She requires ______.

derly need special care in winter, as they are to the sudden changes of weather.

She __________ to have lunch with her friend,saying that she wasn’t feeling well.

下列各组句子中对加点词解释不恰当的一项是（ ）