摘要：30．The extra room very useful when we had visitors． A．had been proved B．was proved C．had proved D．proved
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30．The extra room________very useful when we had visitors．
|
A．had been proved |
B．was proved |
|
C．had proved |
D．Proved |
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30．The extra room________very useful when we had visitors．
A．had been proved B．was proved
C．had proved D．Proved
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30．The extra room________very useful when we had visitors．
| A．had been proved | B．was proved |
| C．had proved | D．Proved |
The extra room ________ very useful when we had visitors．
[ ]
A．was proved
B．proved
C．has been proved
D．has proved
The extra room _______ very useful when we had visitors.
| A．was proved | B．proved | C．has been proved | D．has proved |