Dear Aunt Tara， I have a problem with my homework．We have to do it in a group．It has to be finished this Friday，But Gary，the boy in our group，has done nothing helpful．He just keeps rocking the boat．Every time we talk about the work with him，he always says，"Don't worry．I'll do it later．"But he seldom does his job．And when he does，he does it the wrong way．Someone has to do it for him again．What's worse is when Ms．Lin asks about our group，Gary always tells her that we others don't work hard enough．I'm really mad at Gary about this．We're in the same group．Shouldn't we help each other to do a better job？ Kate

Dear Kate， It is important for students to learn how to work together in a group．Maybe you should talk to Gary about the problem and tell him you all need his help．If he still doesn't change，go and talk to your teacher．I believe she can make Gary do his job． Aunt Tara

54．What does"rocking the boat"most likely mean in Kate's letter？
A．Doing easy jobs．
B．Telling people what to do．
C．Working without thinking．
D．Stopping things going well．
55．What does the underlind"this"mean in Kate's letter？
A．Speaking at the wrong time．
B．Talking too much about himself．
C．Saying something bad about the group．
D．Making excuses for being late for group meetings．
56．Who most probably is Ms．Lin？
A．Kate's mother．
B．Gary's mother．
C．A teacher．
D．A student．
57．What do we know from Aunt Tara's letter？
A．Kate is the best student of the class．
B．Gary has decided to change himself．
C．Gary should be put in another group．
D．Kate should let Gary know how she feels．