Did you know potato chips were invented by mistake?
Wow, I didn’t know that. ...?
Ask and answer one of the following questions 1.Who invented them? 2.When were they invented ?
1. Try to remember the key words and sentences. 2. Try to repeat the history of potato chips.
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Explanation of Teaching
Unit 6 When was it invented?
Ask and answer the above two questions
Ask and answer the above two questions , then ask and answer "How were they invented?
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Summary
1.Key vocabulary: crispy, salty, sour, by mistake, customer
1b Write the name of a different food after each word.
sweet _b_a_n_a_na__, _c_an_d_y_.._. _______________ crispy _a_p_pl_e_, _p_ea_r._..___________________ salty _k_el_p_(海__带_)__,_s_e_a_c_u_cu_m_b_e_r_(海__参__)____ sour _vi_n_eg_a_r_(醋__)_,__o_ra_n_g_e._..____________