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23、-- John and I will celebrate our fortieth wedding anniversary next month．

--Oh，______!

A．cheer up       B．well done         C．go ahead        D．congratulations

22、As is well known to all, the USA is often called a big melting pot, because it attracts people from _______ cultures．

A．traditional          B．similar       C．complex          D．diverse

21、He _______ to be an expert in astronomy, but in fact what he knew about it was either out of date or unbelievable．

A．expected             B．claimed          C．considered         D．remained

20、_______ she is optimistic about her future, she is a little worried about her present situation．

A．Since           B．As long as           C．As           D．While

19、Can you tell me how to _______ a poisonous mushroom from a harmless one．

A．discover          B．judge           C．distinguish           D．differ

18、---____ he have been chosen as captain of our school football team?

--- Yes, he ____．Can’t you see he’s wearing an armband?

A．Can; can                                        B．Must; must have     

C．Can; must have                                       D．Must; must

17、All the dishes in this menu,    __________ otherwise stated, will serve two to three people．

A．a(chǎn)s             B．if             C．though          D．unless

16、Sometimes it is the way people say things, ____ what they actually say, ____ tells us whether they are serious or not．

A．rather than; which                                       B．more than; they

C．no matter; that                                            D．rather than; that

15、Portia, ____ as a lawyer, decided to go to the court to save her friend．

A．dressed herself                                            B．dressing herself

C．who was dressed herself                             D．was dressing

14、One thousand dollars a month is not a fortune but would help cover my living ________．

A．bills          B．expenses          C．prices          D．charges