填空题

S6. The melted rock contains _____________________ and ______________________.

【参考答案】

steam；other high-pressure gases
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填空题
S7. According to the passage, an explosion is cause by ____________________.
单项选择题
A．He will help the woman move them.B．He’ll keep them for the woman.C．He can carry them with one hand.D．He has a few more of them for the woman.
A．He will help the woman move them.
B．He’ll keep them for the woman.
C．He can carry them with one hand.
D．He has a few more of them for the woman.
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