企源知识库

Lucy was unable to______ her surprise when she saw her teacher in the supermarket.
A、envelop
B、screen
C、conceal
D、shield
【正确答案】：C
【题目解析】：envelop包住，盖住。screen放映；遮挡；包庇。conceal隐藏。shield保护某人或某物。句意：露西在超市里看到老师时，无法掩饰自己的惊讶。