4 The professor can hardly find sufficient grounds_____his a

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4 The professor can hardly find sufficient grounds_____his argument.
A which to be based on B on which to base C which to be based D which to base

选B
这是一句定语从句,
这里的which指代grouds
改成比较看得懂的就是
The professor can hardly find grounds which to base his argument on.
可以拆成两句哦
（1）The professor can hardly find grounds.
（2）The professor's(这里的his指代的是教授的) argument is based on grounds.
或 The professor bases his argument on grounds.
总结一下意思就是：教授几乎找不到能把他的理论建立在上面的论据.

The professor can hardly find sufficient grounds_____A_____h The professor can hardly find sufficient grounds （）his argum the professor can hardly find sufficient grounds on which to 英语翻译The professor could hardly find the sufficient grounds__ base on用法The professor could hardly find sufficient grounds_ The professor could hardly find sufficient grounds __his arg The professor could hardly find sufficient grounds( ) his ar The professor could hardly find sufficient grounds___his arg 1.The professor could hardly find sufficient grounds ______ 英语翻译1,The professor could hardly find sufficient grounds on The professor could hardly find sufficient grounds on which The professor could hardly find sufficient grounds _____his