22．Many trees should be planted on the mountains． A．thousand B．thousand of C．thousands D．thousands of 【查看更多】

 

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Many          trees should be planted on the mountains．

A．thousand       B．thousand of          C．thousands              D．thousands of

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Many ________ trees should be planted on the mountains.

[　　]

A．thousand
B．thousand of
C．thousands
D．thousands of

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