A. what was the population of China B. what the population of China was C. how many the population of China was D. how many was the population of China
—When will Mrs Lee come? —I"m not sure ______ . ______, I"ll let you know.
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A. when she comes; When she comes B. when she will come; When she will come C. when she will come; When she comes D. when she comes; When she will come