Read the passage and choose the best answer for each question.
    Congratulation messages are quite common.People congratulate each other on various occasions.Some of these occasions include joining a new organization，winning a competition，scoring good marks，getting engaged and signing a big deal.Other such occasions include successful completion of a project，purchasing a house，buying a new car，having a baby and getting admission in a good university.The list is endless.People wish each other on the social media，via text messages，over the phone as well as in person.It is important to choose the right words to congratulate each other.Different messages of congratulations are appropriate for different occasions.Likewise，the tone and content of the messages should vary based on whom you are congratulating.

（1）What is the best title for the passage？

C

C

A.How to reply if someone say congratulations
B.How to say thanks if someone say congratulations
C.How to say congratulations
（2）People congratulation each other on various occasions，except

A

A

.
A.selling your car
B.signing a big deal
C.purchasing a house
（3）People can send congratulations by

C

C

.
A.text messages
B.over the phone
C.Both A and B
（4）What does the underlined word "appropriate" mean？

A

A

A.Suitable.
B.Good.
C.Fit.
（5）The tone and content of the messages should vary grounded on

B

B

.
A.when you are sending congratulations
B.the people you are congratulating
C.the reason you congratulate