Not until then ________ how important the brakes were.A．I realizedB．do I realize

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Not until then ________ how important the brakes were.

A．I realized	B．do I realized
C．did I realize	D．I did realize

答案

解析

C　[not until在句首，倒装语序。]

举一反三

At the foot of the mountain________.

A．a village lie	B．lies a village
C．does a village	D．lying a village

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If ________ the same treatment again，he is sure to get well.

A．giving	B．being given
C．give	D．given

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—Have you got any particular plans for the coming holiday?
—Yes.________I"m going to visit some homes for the old in the city.

A．If ever	B．If busy
C．If anything	D．If possible

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________ change your mind, do let me know.

A．If should you	B．Should if you
C．Should you	D．You should

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—You should have thanked the hostess before leaving.
—I meant ________.But I couldn"t find her when I was leaving.

A．to do

B．to

C．doing

D．doing so

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