第一节 单项选择（共15小题；每小题1分，满分15分）
21 The writer ___ his writing so that he forgot to have his lunch.
A absorbed B was absorbed into
C absorbed into D was absorbed in
22 ___ with so much trouble, we failed to finish the task in time.
A Faced B Face C Facing D To face
23 ---Who is ____ the patient?-----Maybe his sister.
A taking care B looking for C joining in D attending on
