The number of students in our school 4000 and a number of them good at playing ping pong.
| A．is, is | B．are, are | C．is, are | D．are, is |
The number of students in our school 4000 and a number of them good at playing ping pong.
| A．is, is | B．are, are | C．is, are | D．are, is |
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