以下属于活化石植物的是（）
A.金银花
B.银杉
C.水杉
D.银杏
参考答案：B, C, D
They have to go back home because they ______ all their money. [ ]
A. were spending
B. have spent
C. have paid
D. cost
下列选项属于一般能力的是( )。
A．记忆力 B．节奏感C．色调感 D．曲调感
