I think the best way to go to school is by ______underground.
—Need I wash your car after repairing it?—Yes, that would be much _ .
—When will he leave for Shanghai?—As soon as he _ his work.
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.