36. .........In.... . history, we study past and present events ....In...... . Vietnam and ....around....the world.
37. ....In......... . physics, we learn ....about........how things work.
38. She learns how to use a computer ...in....... . her Computer Science class.
39. Newspapers are ....on...... the racks ......in.......... the middle.
40. Math books are .....on........... . the shelves ...to....... . the left.
41. The largest library is ......in............ Washington D. C, the capital ...of....... the USA.
42. Those books .......at... the back ....of........the libraries are ....in.....English.
43. Now, come and look .....at..........the kitchen.
44. My uncle is ......at....... . work now.
45. Can I see the rest ...of...... the house?
46. She'll have a party ....on...... . her birthday.