4 The professor can hardly find sufficient grounds_____his a
2个回答

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.