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________ useful information it is!

[　　]

A．What

B．What a

C．How

D．How a

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There is ________ “m” in the word “meal”.

[　　]

A．a(chǎn)

B．a(chǎn)n

C．/

D．the

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________ do you spend doing your homework?

[　　]

A．How much time

B．How much

C．How many times

D．How fast

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Mike can work out the problem ________ than Mary.

[　　]

A．very quickly

B．much quickly

C．far quickly

D．more quickly

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________ old man in gray is ________ university professor.

[　　]

A．An ... a

B．The ... a

C．The ... an

D．An ... /

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The Whites often ________ out for a walk after supper.

[　　]

A．goes

B．go

C．going

D．a(chǎn)re going

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The Amazon is one of ________ in the world.

[　　]

A．longest rivers

B．the longest river

C．longest river

D．the longest rivers

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I hope I can buy a big flat ________ 100 square meters for my parents in the center of the city.

[　　]

A．with

B．by

C．in

D．on

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There isn't any drink in the fridge, ________?

[　　]

A．isn't there

B．a(chǎn)ren't there

C．is there

D．is it

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The bus is too crowded. Why not ________ a taxi?

[　　]

A．by

B．take

C．taking

D．to take