为了社会稳定，我们坚决反对人类（）研究。
A、生殖性克隆
B、治疗性克隆
C、生殖细胞
D、再生医学
参考答案：A
Son: I cheated in the exam and was caught by my teacher on the spot.
Father: _______!
A．For shame
B．Cheer up
C．It’s a pity
D．Sorry to hear that
