Teaching goals 教学目标
1. Target language目标语言：
重点词汇和短语
archaeology, tentative, accuracy, excavate, interrupt, ornament, assume, regardless, sharpen, cut up, scrape, ample, primitive, preserve, bead, botany, botanical, analysis, specific, seashell, specifically
重点句子
I’m sorry to interrupt you, but how could they live here?
We have been excavating layers of ash almost six meters thick, which suggest that they might have kept the fire burning all winter.
Yes, indeed, as the botanical analyses have been specifically showing us, all the fields around there used to be part of a large shallow lake.
