At times, parents find _______ difficult to talk with their teenage children.
Tom’s mother is busy _____ breakfast for Tom.
—Could I use your eraser for a while? —Yes, of course you _.
—Do you know the girl __is talking to our English teacher?—Yes. She’s my sister.
—When will the second class begin?—_two minutes.
Most of the work was done by my sister andme B. I C. my D. Mine