题文
The world’s population has grown _____ it was in 1800.
| A.six times more than what | B.more than six times what |
| C.six times more than which | D.more than six times that |
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The world’s population has grown _____ it was in 1800.
| A.six times more than what | B.more than six times what |
| C.six times more than which | D.more than six times that |
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