单词：ethydene
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[00:21.89]Peter,what's one plus two? [00:40.15]Er,um,four! [00:44.90]No!It's three. [00:51.98]plus [01:06.04]What's...plus...? [01:24.61]It's... . [01:33.44]6+4=? [01:50.58]5+3=? [02:00.32]2+3=? [02:09.28]6+6=? [02:19.02]7+8=? [02:29.79]5+4=? [02:57.
初中英语人教版初一