It's a cat. I love ____.[ ]
A. a dog
B. cat
C. cats
答案：C
我国某地有一口井，每年只有1天有阳光直射井底的现象，该地的纬度和该天日期搭配正确的是（ ）
A．23.5°S-冬至日
B．23.5°S-夏至日
C．23.5°N-冬至日
D．23.5°N-夏至日
It's not always easy for the public to see _____________ use a new invention can be of to human life.[ ]
A. whose
B. which
C. what
D. that
