A:They were happy.
B:They did homework.
C:They usually play sports.
John ________ his grandma every day when she was in hospital.
在计算62+(217-84× 37 )时,应先算括号里的(____),再算(____),最后算(____)。
人患重感冒时,往往用嘴呼吸,早上醒来会觉得嗓子非常干,这说明鼻腔能够