根据化学方程式2A+Na2CO3═2B十H2O+CO2↑，推断B与A相对分子质量

Dear Pet,
Without knowing more about you, it’s hard for me to give you some good advice.
But first, I am sure that you are 39  . You said that nobody would care if you left home. What about your   40  ?  And other family members? It seems that you are very 41  . You’d better go to a doctor or talk   42  your parents. They will be able to help you.
Second, I’m sure there’s someone else in your class who feels lonely,   43 . You never know   44 other people feel. Try to make friends with your classmates. And you could 45 a club to meet new people and make friends, too.
You 46  find happiness in yourself. So my  47  advice is to write a list of all the good things about yourself, learn to like yourself, and then  48  will see your confidence (信心)and like you, too.
Editor

小题1:	A．right. B．wrong C．OK D．clever

小题2:	A．teachers B．classmates C．parents D．friends

小题3:	A．popular B．tired C．sad D．happy

小题4:	A．in B．about C．of D．to

小题5:	A．too B．either C．also D．to

小题6:	A．why B．how C．when D．where

小题7:	A．take part in B．join C．join in D．take part

小题8:	A．mustn’t B．shouldn’t C．need to D．can’t

小题9:	A．finally B．last C．end D．first

小题10:

A．other B．the other C．others D．another