We have only one Earth. It's our common _.
A. family B. house C. home D. room
—Need I wash your car after repairing it?
—Yes, that would be much _ .
A. good B. well C. better D. best
—When will he leave for Shanghai?
—As soon as he _ his work.
A. finished B. will finish C. is finishing D. finishes
Tom's mother is busy _____ breakfast for Tom.
A. cook B. to cook C. cooks D. cooking
—Could I use your eraser for a while? —Yes, of course you _.
A.could B. can C. will D. Should
—Do you know the girl __is talking to our English teacher?
—Yes. She's my sister.
A.who B. whom C. which D. Whose
