It’s said to be a case of murder_______ the childrenwere used by adults

MrHarris apologized for the children ______ the lady _____ what they had done

They told me they had just arrived at the last destination ________ you went to last year.

There are a few grammatical errors in her essay, but _____it is a good one.[ ]

Scientists have to work hard to keep _____ with modern discoveries and developments. [ ]