(   ) 3. ―________ the population of the world？

      ―________ about 6. 8 billion.

A.   How many;They're

B.    How much;It's

C.    What's;It's

D.   What's;They're

3. C  詢問population, price, number時(shí)用What's...提問，用It's ...來回答。

題目來源：仁愛英語同步練習(xí)冊九年級上冊下冊合訂本 > Topic 2 The population in developing countries is growing faster.

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