As a student of Senior Three, he has very little free time _________ he can spend developing his own interest.
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.