So difficult______ it to acquire a large vocabulary without the help of a teache

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So difficult______ it to acquire a large vocabulary without the help of a teacher that he was close to giving up .

A．he have felt	B．have he felt
C．he did feel	D．did he feel

答案

解析

在so...that结构中，若将表示程度的状语“so+adj./adv.”置于句首，主句中需用倒装语序，从句中的时态决定着主句中须用一般过去时。

举一反三

—Well, I do think the iPod is a smart, convenient and intelligent. 
—_____.

A．So it is

B．So is it

C．So does it

D．So it does

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Not until midnight_____back from work, drunken .

A．he did come

B．he came

C．didn"t he come

D．did he come

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____ I admire David as a poet, I do not like him as a man.

A．Only if

B．If only

C．As much

D．Much as

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He has been to America twice, _____.

A．so have I

B．so I have

C．I have so

D．so did I

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Little________what you said. I wish you had repeated it!

A．did I understand	B．I understood
C．I did understand	D．have I understood

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