1.单词：

m_re,  l_ss,  f_wer,  p_lluted,  cr_wded,

underw_ter,  electr_c,  cut d_wn,  

l_nd,  en_ugh,  tr_vel.

2.解释: 

Cities will be more polluted./Cities will be less polluted.

Cities will be more crowded./ Cities will be less crowded.

There will be fewer trees in the city./ There will be more trees in the city.

There will be bigger cities underwater./ There won’t be bigger cities underwater..

There will be more tall buildings in the city./There will be fewer tall buildings in the city.

There will be more cars in the city./ There will be fewer cars in the city.

语法:

Future simple: subject+ will + verb

一般将来时：主语+will+动词

3.句型：

What will you do?

I will ……………….

There will be ……….. in the future. 

There will not(won’t) be ……….. in the future.

What will the cities be like?

………………………………

4.

Why will ………………..?

Because ……………………