Iamashamed,sir,thatIwastedalot

I am ashamed, sir, that I wasted a lot of hours _______I should have studied at school.

A．which

B．as

C．once

D．when

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I hurried back home only ________ that I had left my key at my office.

A．to find

B．finding

C．having found

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A．to punish

B．punishing

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A．Finished

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C．What’s up?

D．Not to worry.

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A．noticing	B．to have been noticed
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