I ________ (not/use/enjoy) studying, but I do now. A. didn't ...

★ Used to

I ________ (not/use/enjoy) studying, but I do now.

A. didn’t use to enjoy

B. didn’t used to enjoy

C. didn’t use to enjoyed

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I worked harder before.But now I cannot take so much job at once.

A. I didn’t use to work harder.

B. I used to work harder.