人教版九年级英语下册unit13 sectionA(1a--2d)课件

What caused the problem? People are throwing __li_t_te_r__ into the river. Factories are putting __w_a_s_t_e into the river.
How should the problem be solved? We should write to the __g_o_v_e_r_n_m__e_n_t and ask them to _c_l_o_s_e_d_o_w__n_ the factories. Everyone should help to __c_l_e_a_n_u_p__ the river.
Listen and answer the questions.
1.Why doesn’t Mark want to go swimming with Tony?
Because the river is very dirty.
2. How was the river in the past?
It used to be so clean.
litter v. 乱扔 n. 垃圾
rubbish/waste 垃圾，废弃物
land pollution
Here are some words related to
1a different kinds of pollution. Write
them in the box below. Then add
water pollution

air pollution
noise pollution
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What's wrong with our earth?
What should we do to save the earth?
1. Retell materials of 1b . 2.Think about what can we
do to save the earth in our daily life.
What was the problem?
The river was __r_e_a_l_ly__d_ir_t_y__. Even the bottom (底部) of the river was full of _r_u_b_b_i_s_h__. There were no more __f_i_sh__ for fishermen (渔民) to catch.
more words.
loud music cars rubbish planes littering ships factories smoking building houses mobile phones
noise pollution air pollution water pollution _l_ou__d_m__u_si_c___ __f_a_ct_o_r_ie_s___ ____sh_i_p_s_____ __p_l_an__es______ __sm__o_k_in_g____ ___r_u_b_b_i_sh____ _m__o_b_il_e_p_h_o_n_e_s ___ca_r_s______ ___l_it_t_er_i_n_g___ b_u_i_ld_i_n_g_h_o_u_se_s_ b_u_il_d_in_g_h_o_u_s_es_ ___f_ac_t_o_r_ie_s___
3. What caused the problem?
People are throwing litter into the river and factories are putting waste into the river.
1b Listen and complete the sentences.