单项选择题

Little（）how happy I had been.

A. she realized
B. had she realized
C. she had realized
D. did she realize

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（）is known to all, China is a developing country.

A. Which
B. What
C. As
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If the building project（）by the end of this month is delayed, the construction company will be fined.

A. being completed
B. is completed
C. to be completed
D. completed
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