Though he is 10 years old, he doesnt know that 2 ______ by 4 makes 8.
| A．multiplying | B．is multiplying |
| C．multiplied | D．is multiplied |
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Though he is 10 years old, he doesnt know that 2 ______ by 4 makes 8.
| A．multiplying | B．is multiplying |
| C．multiplied | D．is multiplied |
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