积木、拼板、穿珠等材料应放在()。
A．操作区
B．木工区
C．科学区
D．语言区
参考答案：A
解析：积木、拼板、穿珠等材料应投放在操作区。
After the party, the boy apologized to the girl for the trick he had _____ on her. [ ]
A. taken
B. played
C. undertaken
D. conducted
小儿营养不良是指体重低于正常均值的（）
A.60%
B.70%
C.85%
D.95%
E.90%
