At the meeting they discussed three different ___ to the study of mathematics.,

1I have twochildren, and ________ of them are working in the west of China.

Youcan’t borrow books from the school library ______ you get your student card.

You bought the car ten years ago—Yes. ______ it’s old, it still runs well.

seems in low spirits.— Yes, all her efforts were ____ and no one wasinterested in her invention.