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Many years ago, Mr Green saw ________ unusual thing in the sky．He thought maybe it was ________ UFO．

A．an, an

B．a, the

C．an, a

D．the, a

He never chats with others．He always ________ everything to himself．

A．keeps

B．lets

C．makes

D．speaks

Of the two T-shirts, I'd choose ________ one to save some money for a book．

A．the cheapest

B．the cheaper

C．more expensive

D．the most expensive

When the little boy saw his mother, he ________ very excited．

A．were

B．got

C．becomes

D．feels

Simon's MP4 player isn't ________ expensive ________ mine．

A．so; so

B．as; so

C．as; as

D．as; than

When something ________ me, I can always go to her．

A．worried

B．is worried about

C．worries

D．is worrying about

Work hard, ________ you'll fail in the English exam this time．

A．and

B．but

C．so

D．or

I'm tired now．Let's stop ________．

A．having a meal

B．having a rest

C．to have a meal

D．to have a rest

There are over ________ books of all kinds in the library．

A．nine hundred of

B．nine hundreds

C．nine hundred

D．hundred of

I think American English is a little ________ British English．

A．different from

B．difference from

C．difference in

D．different with