20xx春牛津深圳版英语九下unit4naturaldisasters5内容摘要：
is often ss to work in groups and find out all the rules. 2. Cultivate Ss’ ability of concluding 5 used to refer to “the time, the season, the weather, the distance, the temperature” 4. Observe the three sentences and conclude it as the empty subject to replace a toinfinitive. 5. Study the rule of it as empty subject. 3. Help ss to work out the rule. 4. Help s。阅读剩余 0%
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