—You seem busy these days.—Yes. I’m looking for a house. It’s really not easy to find wit

问题补充：

—You seem busy these days.

—Yes. I’m looking for a house. It’s really not easy to find with four bedrooms.

A. one

B. the one

C. it

D. that

答案：

(答案→)A. one

B. the one

C. it

D. that

解析：句意：--这些天你看起来忙。--是的。我在找一所房子。找到一个有四个卧室的房子真的很不容易。One代指可数名词的单数形式，表示泛指。the one 代指可数名词的单数形式，表示特指。it代指前文出现的事物，具有唯一性。That代指不可数名词。此空代指前面的a house，故选A。