根据所给汉语完成句子 (每空1分，共9分)

小题1:这是我的房子，位于市中心。

This is my house, ______ ______ in the center of the city.

小题2:你最近有收到他的来信吗？

Have you _____ _____ him lately?

小题3:就他看来，这个交易很不错。

It is a good deal, as far as he _____ ______.

小题4:看到蛇的时候我吓死了。

I was _____ _____ _____ when seeing the snake.

It is obvious to the students______they should get well prepared for their future.

A,as      b,which    C,whether      D,that