[ Preposition ]
We must not carp _____ the errors of our ancestors.
A. Form
B. With
C. About
D. In

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Gerund vs. Infinitive › ViewWe congratulated ourselves on to be/ being in that situation
A. We congratulated ourselves on to be in that situation
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We _____ for you when the train arrives.
A. will wait
B. will have waited
C. will be waiting
D. will be waited