下列各句中，加线的成语使用正确的一项是（ ）

．—MustI give the pen to the manager —No, you may give it to________youthink is on duty in the office ．

How about Jim ? —- He came home _____ .

ve made a few pronunciation mistakes in youroral exam, but ______ , it is fairly good

Tom was so tired that he fell _________on the bed and went to sleep