So difficult __________ it to work out the problem that I d..

So difficult __________ it to work out the problem that I decided to ask Tom for advice. A.I did findB.did I findC.I have foundD.have I found

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The girl spent as much time as she ____ her lessons.A.coul..

The girl spent as much time as she ____ her lessons.A.could going overB.could go overC.went them overD.went over

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Not until midnight_____back from work, drunken .A.he did ..

Not until midnight_____back from work, drunken .A.he did comeB.he cameC.didn't he comeD.did he come

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I failed in the examination last term and only then ____ the..

I failed in the examination last term and only then ____ the importance of studies. A.I realizedB.I had realizedC.had I realizedD.did I realize

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_____ I shouted at the top of my voice _____ turn his head...

_____ I shouted at the top of my voice _____ turn his head.A.Not until; did heB.Not until; he did C.Until; he did notD.Until; did he not

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