题目内容

You can begin eating only when everyone has been served.

A. 对
B. 错

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The head of state was welcome with full ceremony.

A. 对
B. 错

群;组;束;串;簇;群集;聚集

vt. 限制;束缚;关押;监禁;禁锢

模棱两可;不明确;模糊性;含糊