一轴晶负光性的宝石是：（）。
A.海蓝宝石
B.紫水晶
C.托帕石
参考答案：A
She likes _______ but she doesn’t like _______ now, because there are too many people in the pool.
A．swimming; to swim
B．swim; to swim
C．swimming; swimming
D．to swim; swimming
