3、at, in
1) at+_小__地__方__(村__庄__,__小__城__镇__) 2) in+_大__地__方__(国__家__,_城__市__)_或__某__个__范__围__之__内_
1) He arrived _i_n_ Changsha yesterday. 2) They arrived _a_t_ a small village before dark. 3) They arrived _i_n_ Beijing at 12:00 and waited for a bus
of Australia.
5、in, on
_o_n_ the tree (树上自身具有的花,果，叶等)
_i_n_ the tree (外加在树上的事物)
on the wall (墙表面的事物)
in the wall (镶嵌在墙内部的事物)
1) There is a map _o_n_ the wall. 2) There are two windows _i_n_ the wall.
2.The blue ball is _n_e_x_t_t_o_the cube. 3.The red ball is __o_n___the cube. 4.The purple ball is _o_v_e_rthe cube.
5.The pink ball is a_b_o_v_e_the cube. 6.The orange ball is u_n__d_e_rthe cube.
o)’clock. 请10点以前来。(2) by指“不迟于，到……时为止，在……以前”。
如： ☞We had learned over 1000 words by the end of last term.
