I think this is ___ useful book, so I will keep it for ever.

I think this is ___ useful book, so I will keep it for ever.

#32384

the

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I have been living in London for more than ten years, so I have ________ good knowledge of this city.

#32611

the

Perhaps we will live in _________ dome on Mars.

#32718

a 8-bedrooms

an 8-bedrooms

a 8-bedroom

an 8-bedroom

We can have_______ bluer sky if we create________ less polluted world．

#34650

a；a

a；the

the；a

the；the

There is ______ "f" and ______"u" in the word "four".

#33896

an, a

a, an

an, an

a ,a

There was 　　　 interview with Yao Ming on CCTV-5 yesterday evening. But it was a pity that I missed　　　    　　　 beginning.

#32513

an; a

an; the

a; the

the; the

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