—What _____ the population of China?—One third of population _____ workers here.
—What \_\_\_\__ the population of China?—One third of population \_\_\_\__ workers here.
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I remember _____ to the zoo by my father when I was little.
I remember \_\_\_\__ to the zoo by my father when I was little.
I regret _____ you that your application has been refused.
I regret \_\_\_\__ you that your application has been refused.
The electric shaver _____ before it can be used.
The electric shaver \_\_\_\__ before it can be used.
_____ it is you’ve found, you must give it back to the owner of it.
\_\_\_\__ it is you’ve found, you must give it back to the owner of it.
_____ people found out the behavior of electricity.
\_\_\_\__ people found out the behavior of electricity.
_____ the day went on, the weather got worse.
\_\_\_\__ the day went on, the weather got worse.
I decided to stop and have lunch, _____ I was feeling quite hungry.
I decided to stop and have lunch, \_\_\_\__ I was feeling quite hungry.
He is a man of great experience, _____ much can be learned.
He is a man of great experience, \_\_\_\__ much can be learned.
It was not until she arrived in class _____ realized she had forgotten her book.
It was not until she arrived in class \_\_\_\__ realized she had forgotten her book.