People on the grassland of    is now Kazakstan were the first to achieve both riding and milking horses．

Some of us fail to learn that pain is the body’s way of informing the mind ______ we are doing something wrong, but not necessarily ______ is wrong.

The old gentleman is considering _________he move to New York with his daughter and son-in-law or live alone at home.

A modern city has been set up in______ was a wasteland ten years ago.

You may choose one from _________ was left.

He asked me _____.

I asked her _____ have to study before I could go to university.

I’m writing to ask ______ you can do me a favor.

The road is covered with snow.I can’t understand ______ they insist on going by motorbike.

He asked me ______.