案例教学中的案例设计必须遵循的首要原则是（）。
A、针对性
B、真实性
C、新颖性
D、艺术性
参考答案：A
Some animals in the zoo looked very ________ and ________.
A．beautiful, love
B．beautifully, lovely
C．beautiful, lovely
D．beautifully, love
—Do you know where David is? I couldn’t find him anywhere.
—Well. He _________have gone far—his coat’s still here.
A．shouldn’t
B．mustn’t
C．can’t
D．wouldn’t
