Up till now we _______ four units and this will be the second time that we _______ a test.
Stop _______ me to hurry up. I can only go so fast.
Certainly I posted your letter — I remember ______ it.
Please remember _______ the plants while I’m away.
Please excuse me _______ your letter by mistake.
After describing the planned improvements, she went on _______ how much they would cost.