填空题

As is known to us, all the (burn) ______ of any fuel requires oxygen.

【参考答案】

burning。
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填空题
Learning how to use the Internet (effective) ______ is very important for the students today.
单项选择题
A．11 p.m. of that day.B．11 a.m. of the previous day.C．11 p.m. of next day.D．11 p.m. of the previous day.
A．11 p.m. of that day.
B．11 a.m. of the previous day.
C．11 p.m. of next day.
D．11 p.m. of the previous day.
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